Introductory guide to sowing seeds

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(upbeat music) - Seeds are precious. And it's coming up sowing time now, this is actually January. And I'm always saying, please don't sow anything in January, I don't sow anything in January, unless you don't want to eat anything. That's the old saying. Sow in January, you won't have to eat anything. It's generally not a good month because there's not so much light, there's not much warmth, but more than anything it's about thinking ahead to what conditions will be like once you've got some little plants to plant out. 'Cause that's what we're doing in here. And this is about raising plants to transplant outside, mainly. Or under cover like behind me, are salads that we've been growing in here all winter and picking from already three or four times. And we keep picking leaves off the same plants. So that's under cover growing. But I'm talking mainly in this video about sowing seeds to go in the garden. And therefore you don't want to sow them too early 'cause it won't be warm enough or light enough even outside until say at least spring. So what I want to do, though, is set you up with the knowledge that will help you to be more successful in sowing. And there's many factors to consider. Like where should we start? What you're going to sow the seeds in, the actual tray or container, there's a selection here. I've got seed trays, module trays. So this seed tray, why is it called a seed tray? It's used for sowing lots of little seeds often. One feature of these trays is they don't have very good drainage. Here's another one, old dirty one. I'm very happy, by the way, to use old trays. They work really well. You don't have to wash or sterilise them in between use, so that'll save you one job. But you do always want some drainage. So at least the few holes there is better than one like this. So this would be a tray you'd never want to use for sowing seeds because you'll water and then the water will just sit in the bottom, it can't escape, and your seeds will rot. Drainage is really important for successful growth of germination and growth of seeds. And I found I actually get better results from sowing in a module tray than in a seed tray. Because do you see the holes? They're quite substantial in size so there's more chance for the water to drain away. There's going to be more air in the mix. Air is as important as moisture. There are bigger module trays as well. And I'm going to explain in different situations or for what seeds you would use larger trays, or trays with larger cells. Trays with smaller cells, but more cells per tray. Or seed trays. So those are some options. Then we have consideration, actually, no. I should mention these. Two more things here, homemade. So rather than buying a module tray, you can make your own using an egg carton. That's what this is. It's something I sowed pea seeds in just to see. This is just for trial. I wasn't aiming to get these plants in the ground. Or I could do in here. Still early for outside growing. But you can see that's worked nicely and I'll explain also a little bit about multi-sowing. So this I put two seeds, home-saved pea seeds in each carton cell there. And here I made some little pots out of rolled newspaper. Which was not ideal. It's not an easy thing to manage because of how you fill them to get it in there without getting compost all around. Which actually doesn't matter, but then you get to the point where you want to get them out we'll do that in a minute and have a look, but yeah. It's not as easy as actually having a module tray where you can pop it up from below. That's the idea of the module cell. And then you can see the little roots at the bottom, which is fine. They could sit in there for quite a while yet, or they could be planted at that stage. You've got many options. What this is about is getting seeds going in the best conditions so that the seed germinates and succeeds with its germination. That's more difficult often than actually growing on a seedling. Seeds need more warmth for germination than they do for actually growing as little plants. So that's where often can be a problem, especially in the spring, we're sowing seeds directly in the soil. The soil's still very cold. Whereas often you can put a transplant in the soil at the same temperature and that will grow. And if you sow direct, you might lose your seeds. This is the issue. So with doing it like this, you can have close to a 100% success from what you sow as long as the seed was good in the first place. And this is actually something that's harder to deduce, because how do you know the seed that you bought is a good, fresh seed? Does it tell you anywhere? And on the packet it actually will say packeted year ending, at least in the UK that's what the law says it has to say. It tells you when it went in the packet, basically. It doesn't actually tell you how old the seed is. There's a minimum germination rate, but the germination rate is often measured in a laboratory with perfect conditions, which we can rarely achieve even in a greenhouse. So we just have to do our best. But generally giving warmth is a big factor. And these, until just now, have been in the house on the windowsill of my conservatory. Which is not super hot, but when the sun comes out, it gets warm overnight. It's maybe 12, 14 degrees, 50s Fahrenheit. Whereas in here, greenhouse, ah, should be warm, eh? It's okay at the moment. At the moment the temperature in here is about, it's about 12, actually. Last night, it went down to below -2 centigrade in here. We had a frost. So even in enclosed structures, it can be cold at night. And this is one issue with seed germination. Cold nights stop the germination because the seed is taking in that fact. It's all, whoa, this is too cold, I'm not going to germinate now. It needs constant day night temperatures to be at a reasonable level. Now that these peas have germinated, because I've managed to keep them warm at night, It was about 10 days ago I sowed these. They can stay in here, and these could freeze at night. That will be fine. I'm not saying I want them to, but it won't kill them. So that's the difference. It would have stopped them germinating, but it won't stop them growing. It'll slow down their growth. Pretty much all the seeds I'm going to show you are seed I've saved myself. And that links back to what I was saying about seed age. When you save it yourself, you know how old it is. And not all of it's fresh, actually. Like these peas, as it happened, that was three years old, 2018. Gosh, you know what that was four years old, I saved the seeds. It was a good year, 2018. And the quality of the seed was good. And I'm just keeping them in a spare room in the house, getting a nice result. But normally I find it worthwhile to sow young seed because then you know that all the time and effort you're putting into getting your tray together, filling it with compost, looking after it, watering, blah, blah, blah, you're pretty confident you're gonna get a result. And fresh seed will give a nice result. And that's like what we got here. Slightly leggy seedlings. Again, that's the effect of the windowsill. These were sown at the same time, so that's lettuce, that's peas. The lettuce is home-saved seed from two years ago, actually. I would say pretty much every single seed's come up. I find that generally with home-saved seed the germination rate is very good. And this was using the other end of the egg carton. So the partition bit had the peas and the open top lid I just filled it with compost and scattered lettuce seeds on top with not much on top of them using... Don't cover your seeds too much, that's a key thing I want to emphasise here, is don't bury them too deep. And this leads me onto type of compost to use, because in the compost that I sowed these in, you can see quite a bit of this white, flaky stuff. And that is called vermiculite, which is an expanded rock. And it's very light and free-draining. And that's coming back to drainage. It's what particularly seeds, germinating seeds, and their little tiny roots really benefit from is having some air, plenty of air around those little roots. It doesn't want to be completely moist. Too much moisture is often what kills seedlings much more than too little. So be careful about watering, don't over-water. Like in fact, this is a good example. Is this tray I have not watered since I sowed those seeds. So what I do is, when sowing, get it really most. You know it's 100% as full of water as it can be. Not totally dripping, dripping, 'cause thanks to the vermiculite, but moist. Then I scatter seeds on top, a little bit of vermiculite on top, and it's been in the conservatory with a little bit of glass over the top for the first week. And that kept the moisture in and then the seedlings came up. And like I said, no water in the 10 days since it was sown. Compost wise, there are so many options. Sometimes I despair. They change every year, and you can have sacks of potting, or seed compost as it's called, which have the same label year on year, but change the contents. So you don't always know what you're buying. In fact, you often don't know what you're buying and it's very confusing. I can show you two physical examples here and how they can vary in terms of structure and content. This is one that's made from a material called digestate, and I'm not recommending this, but I'm just pointing it out to you. Because I've noticed that digestate is getting very common now, and that's purely because people are very subsidised, producers to make the methane, ferment it. This is plant material, though, maize and grass stems, make the methane and then they got the dry matter, the solids, what do they do with them? They worked out they can sell them as compost. They're not rich ingredients. And what they do have is good structure, a lot of fibre in this, that's fine. But compared to more traditional composts which have more nutrients, in fact I can show you exactly the result of what's happened with that one. It's one that I was sent to try. And so five weeks ago we sowed broad beans, and this end is the digestate compared to broad beans sown in the compost I normally use, which is from Yorkshire. It's called Moorland Gold. I'm not necessarily recommending that one either, actually, just because it's a small company. So don't everybody rush out and try and buy it. But you know, there are other good composts around, like Daleford, say. But what I'm really wanting to show you here is just that difference. And if the only compost you'd used for your sowings was this one, it would have been a disappointment, to say the least. You know, that can really compromise you. You'll have spent a lot of money on seed. I'm not saying these won't grow, but quite a few of them are not going to grow to their full potential. One like that will just about make it, I reckon. One like this, I don't know. So do the best you can, is all I can say. There is one more option for those of you who are pretty organised in other ways. Here, this compost is some from my own heaps. You can use your own compost if you make it. Nicely enough, and if you can sieve it, so we put this through a four millimetre sieve, you can see it's pretty fine. And it also sieved well 'cause it's quite dry, 'cause I've got a roof over my compost bay. So there's all these different factors to consider. It's not just so simple as going out and getting a bit of garden compost to use. You need to think ahead a bit and do a bit of work on it. And partly because we're talking about putting compost into quite small compartments, the cells of a module tray. So it can't be big, lumpy stuff. It needs to be reasonably fine. Fine, but fibrous. You know, that's the bit where the digestate it is doing well, it's fibrous. So what I've done, actually, with my recent sowing is I've mixed the two, the Moorland Gold, which is quite black and quite a bit of green, most compost and the fibres of the digestate. And at the moment, just to see, I'm always trying different mixes, combinations. And that's what I'll be using when I fill trays. So we're looking to raise a nice, strong transplant. But to get to that stage, this is often rather than sowing in a module tray, one often starts with a seed tray. Why? Why not sow direct into modules? Well, because some seeds are so small that you actually can hardly hold them. Hardly see them, let alone hold them. And so it's physically not possible to sow a certain number of seeds in module cells. And also there are some seeds and seedlings that really like this kind of compost that's not rich. Generally speaking, I'm using the same compost for all my sowings. And the only difference I'm making is adding a bit of vermiculite, particularly when I'm sowing into seed trays where the drainage is not so good, or there's two vegetables I'll mention, three actually. Particularly basil. I find that basil really doesn't like having wet roots. So I'll always have more vermiculite when I'm sowing basil. And lettuce to some extent, as well. The seeds and seedlings of lettuce like it light and not too dense and watery. So what I want to do at this stage is get this tray with its compost fully saturated, and then I can sow seeds on it, mostly on it because you don't want them to be too deep at this stage. And if I show you some examples. Generally speaking, I try not to water too much before I'm handling seeds, because I don't want to get the seeds wet. That's why I'm slightly hesitating here. But just for purposes of the video, I'm doing all of it together. These are some old seeds, actually, that's why I'm slightly sacrificing a bit. This is celeriac, and it's not the time of year to sow celeriac. Best time of year to sow it is middle of March. Same for celery, first sowings, you can find all these dates in my calendar, we also produce a timeline that you can have on a wall chart, or you can find the dates on my website on the page there. That is celery seeds. And I'm pretty sure you can hardly see them. And it would be very difficult to actually pick them up individually. So what I do with tiny seeds like this you can hardly see perhaps not many is in there, it's just a few. I'm just gonna sprinkle them over the top of the compost there. And tiny as they are, that could well be 30 or 40 fell down there. And that's absolutely fine, because they can then germinate and then they can be pricked out. And pricking out is where you need a little tool. I think that might be a special pricking out, a bit of plastic. You could use a pencil. I used a pencil for many years. And then you're going to lever out the little seedlings. Like that, hold it by the leaf with a bit of root on. I'll just pretend I'm doing it there. You're going to make a hole in a module cell and push it in. So if I talk about pricking out, that's what I mean. It just means moving a seedling from a seed tray to a module cell so it's got it's own little area or volume of compost to grow in. But this is a very good way to start seeds out, certain seeds, lettuce seeds as well. Actually what I do is after sowing them in a tray like that, I'm not going to cover them, but I'll do that. And the water on them helps them to settle in, make sure there's contact with the moist compost. And then I need a bit of glass, which is here somewhere and I can't see it anymore. It's disappeared. So basically I'd put a bit of glass on top, or you could just lay a bit of polyethylene bag on top or anything just to hold the moisture in. And this then I would put in the house to germinate. I do that a lot in the late winter, early spring sowings. For the first week they're indoors, literally indoors because of the nighttime temperatures being so much higher. So we have the next step, which is say a module tray, filling a module tray. So this one I like. It's actually one that I designed myself, and that's why I like it. Because it was basically... Over 38 years of propagating, I'd never really found a tray that quite fitted all the specs I wanted from what I found works really well. It's really solid polypropylene. I'm afraid it is plastic, but it's a once in a lifetime plastic. This is going to last forever, you know. You can walk on these, they're really solid. And then it's got a decent sized hole at the bottom. So they're good drainage, and that means also you can pop the modules out. And it's not too big, it's got a tapering bottom. I prefer the shape of it to that one. Do you see how much smaller volume that is compared to that? And actually for a lot of seedlings, you get a better result for giving them less compost. Don't assume that putting a seed or seedling in a big pot is going to automatically make a big plant, because it's got a lot of growing to do before it's able to use that expanse of compost. And often that gets too wet at that stage. It's so easy to over-water in enclosed space containers. So with this one it's very unlikely you're gonna saturate those roots with water. And it means you need less compost. One of these trays, the amount of compost is two litres to fill a tray like that. That's less than half a gallon. And I did this one yesterday, and I also made little holes in it, still dry. You can see it's quite dry on top, I haven't watered it yet. And that's holes for sowing. So that's ready to go, ready to sow. This one I'll just mention why have I got this here, it's for larger seeds. This one serves for most vegetables. This one I'd use for large seeds like, I think I've got a few here somewhere. Don't know if I'm going to find them. Kidney beans, for example. These are some home-saved. You know, they're so big that they, well, you probably could do it in there, but you'd be struggling a bit. And broad beans or fava beans. Whereas these ones the slightly smaller trays, they can work for peas, and sweetcorn, and French beans. Middle-sized seeds as well as smaller seeds, like here for example. These are some home-saved onion seed, which I'm pretty happy with. With home-saved seed, you often get a few imperfections, little bits of debris. And it doesn't matter, actually, I'm not selling them. As long as there's not so many that they're going to get in the way of the sowing. And here I'm going to do something called multi-sowing, which is dropping up to six onion seeds. Generally speaking, I don't have time to count them out individually, but I'm putting in a pinch, which from my experience approximates to six. So what'd you do with seeds that are leftover in your hand, if you haven't got many, well, put them back in the seed packet, but it's not ideal because they picked up a bit of moisture there already. You know what, I'm actually going to throw these out. I wouldn't normally be quite as careless as that, but it's to make that point, and keeping them dry really helps. That's probably the factor in conserving your seeds that's more important than anything. What's next, we have some coriander here. This is home-saved coriander, as well. This is a great example for multi-sowing. They're seeds which are easily large enough to handle. And I'm going to pop three. Why multi-sow? It takes up less space. You need less compost for the same number of plants. You're raising more automatically in a given space. And you, you get the advantage of proximity. Oh, doubled up there. So the seedlings, they're germinating with their mates, and they're going to go in the ground with their mates. It's a kind of companion planting, if you like. And all I can say is from experience, it works really well. Okay, peas, that's certainly different, very visible. Now, because these are bigger, how many would I sow? I would often put two, even in these small cells. So you just literally put them on top. With companion planting, you can put them separately or they might end up together in the middle. You know, in terms of actually, they can go back. Where they actually end up, it's entirely up to you, but it's not going to affect how they grow. 'Cause I know I've been asked this sometimes, do they have to be spaced out when you're companion planting? No, you just put them in, basically. Broad beans, yeah, okay, let's have a go in the very small cells here. It's also a point about sowing large seeds. I'm often asked, do they need to be pointy end down? That's actually the end where the root's going to come out. It doesn't matter that they have to be that way. It works very well with all these flat seeds to put them in flat. That's quicker and easier, and you don't have to worry about where the roots are going to come out. Okay, what have we got here? Oh, now this is something I'm not going to sow, actually, 'cause it's so out of season. Just to make that point as well. French beans. These are home-saved French bean seeds. I don't sow them until the middle of April. Sorry, even late April. Late April for the very first plantings. Here we can have a frost until the middle of May. Those are really warmth-loving plants, French beans. So just don't sow them too early, nor runner beans. Tomatoes, I've got some tomatoes here. Yeah, Red Brandywine. So I would say tomatoes are a good example of where you could either sow them... See they're decent sized tomato seeds, like that. And it could be one or two. But then I would thin to one. Or you could sow them in a seed tray and then prick them out. They handle nicely. I mean, you could prick anything out. The only seeds that you wouldn't want to prick out and are difficult to raise as transplants is carrot and parsnip, because of their long tap roots, and they'll tend to break when you transplant them. Everything else you're seeing here is totally transplantable and the extra, and I don't think it is a lot of extra, but the extra work involved in raising the transplants you easily get back in terms of the quality of what you've got out there. You've got a full bed, it's all nice and even, and maximum use of space, and maximum growth of seeds. These are home-saved lettuce, which I'm not going to sow there. But you could actually. If I wanted to sow lettuce here, I'd do two. Two ideally, often three land. They're a hard one to count out, especially home-saved with the bits of debris in there. Generally speaking, I personally, anyway, I want to grow one lettuce in a station in a space. And so we'd thin those out. This is another thing you can do. You can so more seeds than you actually want and then thin to the strongest. You could do that with chard as well, for example. If you want one chard seed... Spinach, actually, we could do next, because that's a bit similar. You know, with spinach, this is a spinach plant which actually has two plants there. And this, in an ideal world, especially for the spinach, this would have been in the ground last October. This has been sitting here all winter, actually, it's testament to the quality of this compost, the plants are still quite green. They haven't been fed or anything. You know, you can still plant these. And as two plants that will make a nice clump where you can pick quite a few medium-sized leaves, or if you took that one out and then you just planted it as one, then you'll have bigger plant making bigger leaves. It would be difficult to divide them at this point, but you could try. I often grow spinach in twos, 'cause I don't want enormous leaves, but lots of medium leaves is nice. So part of the thing with the multi-sowing is about being clear what you want from your plants. It's not like saying this is the rule that you have to follow. And you can try a few things. And here's a good example this spinach, actually. Why it's a little bit interesting where you get these clumps. This is home-saved seed and we see it developing on the stalks of the plant. It's not like a classic seed. It's a sort of little clumplet and it makes it a bit hard to sow with precision if you want a certain number, because you're often putting in a clump. And I'm aiming for three seeds in a cell, which in turn is aiming for two plants. I'm going to thin out, pull out the weakest one. So that's how they would run. I've nearly got to the end now. I just want to see what else I've got here. I'll mention radish. Radish is such a good seed to sow at this time of year. This is going to be my last sowing of this video. And it's a nice one to finish on because it's the first one that you want to do. I recommend from the middle of February. And when you grow radish at this time of year, it's much less pungent. It's mild and juicy. And this variety, Rudi, R-U-D-I, you can allow to grow quite big and it doesn't get woody or hollow. So it's a very versatile vegetable to have. It'll sit there, and with multi-sowing like this, I'm putting in five or six seeds, aiming for four plants in a clump. So you get them all growing together and then as soon as you've got one that's the size you like, you can twist it out gently and the rest of them carry on growing. So from one sowing, especially early in the year like this, you can get quite a few harvests. Ah, there we are. So just in terms of covering up these seeds, the old saying is to cover the seed with as much compost as the seed is thick. And so with a broad bean, that would be quite a lot. This is one disadvantage of doing lots of different seeds all together, like I've done there, which this can work. It's easier generally, and because also you'll be planting all out at the same time to have your same seeds together. And we, for that reason partly, we've brought out smaller versions of this tray. So this is a 60, and it's going to be available in a 30 and a 15. In the UK that will be available from February, and in the US from March. We have a distributor in the US now, the link is in the description. We have a distributor in Europe as well for these trays. So I'll just finish with covering the compost to show you. So I actually take some new compost at this point and just sprinkle it over the top, more or less I'm judging according to the size of the seed. And where it was lettuce, I'm not actually going to put any new compost on. I'm just going to flick the existing compost over it. With broad beans, I'll ladle on as much as I possibly can. I wouldn't normally sow them in this, but it's just to give you an idea, you know, how it works. What the principles are of sowing seeds. That's what this has been about so that you understand how you can get the best from your precious seeds and how to look after the seedlings a bit, but it's more about sowing them in the right conditions, at the right time, in decent material compost, and in a suitable tray. And on that note, I'll finish and hand it to you. Enjoy your sowing season, which goes on right the way through until September, October. (gentle music)
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Channel: Charles Dowding
Views: 128,169
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Keywords: how to sow vegetable seeds, how to sow seeds, module trays, Sowing methods, Charles Dowding videos, no dig, propagation under cover
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Length: 29min 41sec (1781 seconds)
Published: Mon Jan 24 2022
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