How I Plant Lettuce (and Other Veggies) in Raised Beds – A Simple Seed-Starting Method That Works

It’s a beautiful day out in the veggie garden, and I wanted to show you one of the easiest ways I’ve found to start seeds (#ad) — especially in raised beds, where you’ve got a bit more control over your growing mix.

I’m planting White Boston lettuce today, which I’ve had great success with in our warm climate. But this method works just as well for most small-seeded veg — think mizuna, rocket, bok choy and many other Asian greens, spinach, beetroot, even carrots.

If you’ve ever had trouble getting seeds (#ad) to germinate — maybe they dried out too fast or got waterlogged in heavy soil — this method helps you avoid both.

Why I Use Raised Beds

I grow a lot of my veggies in raised beds. They’re easy to work with, better for drainage, and they give me a lot more control over what’s going into the soil. It also helps keep some of the wildlife from eating all the produce, although it's certainly not completely secure. I love how the mulch (affiliate link) stays put in raised gardens because of the edges, and being a bit higher up also saves your back.

I have several different types. Some are wonderful, corrugated iron beds from The Organic Garden Co. I'm currently in the process of moving five of those from the veggie patch in the paddock to the house yard. The house yard is my permaculture zone one (see overview below), so this is where I want my veggies and other frequently used plants.

I also grow veggies in Aussie Gardener‘s 400L veggie garden bags, and we have a bunch of big geofelt grow bags, too. All our veggies are doing amazingly well in raised beds, probably mostly because we have full control of what goes into them. You can fill them with whatever you have left lying around, and replenish the soil regularly with manure, compost, mulch (affiliate link), etc.

What I Fill My Beds With

We’ve got five horses, which means we’ve got a lot of manure — and I use it. A lot.

Horse manure is fantastic for building garden beds, especially when it’s well aged. I mix that with compost I make at home using autumn leaf drop and lawn clippings. I just run the mower with the catcher on, mix the browns and greens together, and let the pile sit. I give it a turn once a week when I’ve got the time. Keeping it watered helps it break down, too.

Once it’s broken down, that compost goes straight into the veggie beds. If there are still some weedy bits or half-rotted patches, I don’t worry — most of it keeps breaking down in the bed, and I just top it up as needed.

If your raised beds are tall, like mine from the Organic Garden Co., you can start off with banana tree pieces, sticks (a bit like Hugel Kultur), weeds… Basically anything that will eventually break down. You will end up with a lower soil level, but that composting process brings you tons of nutrients, and it's great for the soil around the raised beds, too. If possible, I recommend using raised beds without bottoms.

The Top Layer Makes All the Difference

Now, here’s something I’ve learned the hard way: if you only use compost or manure, it can be hard to keep your seedbed moist enough. The surface tends to dry out too quickly, especially in warm weather — and if seeds dry out before they sprout, they’re done.

So here’s what I do now, and it’s made a big difference:

I top the bed with a really thin layer of potting mix or seed raising mix. Just about an inch thick — not much at all. Enough to create a moist, even surface that holds water better and gives seeds a good start.

Yes, potting mix isn’t free, but this way you don’t need much. I just use it for the top layer, and everything underneath is homemade compost, manure, and garden scraps.

What I’m Planting – White Boston Lettuce

Today I’m planting White Boston, a loose butterhead-type lettuce that does really well in warm climates. If you’ve tried growing lettuce in the tropics or subtropics, you’ll know how tricky it can be — they often rot at the base or bolt quickly in the heat.

White Boston grows a bit taller and keeps its leaves off the soil surface, which helps reduce rot. I’ve found it holds up better in our muggy weather than other varieties.

How I Sow Seeds

This part is simple!

I use my fingers, a little garden fork, or a cultivator to lightly rough up the surface of the potting mix — not digging, just creating a bit of texture. This gives the seeds little pockets to settle into.

Then I take a pinch of seeds between my fingers and sprinkle them over the surface. You don’t need to be exact. If you’re growing for baby leaf or salad picking, it’s fine to plant a bit thick. In fact, I like to sprinkle quite a few — I can always thin them later, or just start harvesting early.

Once the seeds are down, I give the surface a light tap with my hand — just to settle the seeds into contact with the soil.

Watering

After sowing, I give them a really good soak with a watering can, or get yourself a nice, gentle spray gun. You want to make sure the top layer is fully wet. This is the key to getting good germination.

Then I keep the surface moist every day — sometimes twice a day if it’s really hot — until the seeds sprout. After that, I ease off a little, but still keep them consistently damp while they’re small.

Lettuce seeds especially need moisture to germinate well, and they don’t like being buried deeply. That’s why this method — with shallow sowing and good surface moisture — works so well.

Seeds for Resilience

Grow heirloom seeds (#ad) that taste better, handle your climate, and give you seed (#ad) to replant year after year! Cut costs, be more self-sufficient, and build resilience in your own garden.

SHOP SEEDS

What Happens Next

The little lettuces usually pop up within a week. I planted this exact same way just last week, and already the White Bostons are up and looking happy. Within a couple of weeks, I’ll start picking baby leaves for salads. If I leave some to grow, they’ll eventually head up into full-sized butterheads, if they don't bolt first. I've found that with growing lettuce in the tropics, you need to start eating them as soon as you can because they do tend to bolt before you get a full head.

The beauty of growing your own lettuce like this is that you don’t have to wait for full heads. You can harvest leaf by leaf, as needed, and the plants just keep going. Don't forget to leave a couple to go to seed (#ad) so you can save your own seeds for next year!

A Few Extra Tips

• If you’re in a very hot or dry spot, you can lay a bit of shadecloth over the bed until the seeds sprout. It helps keep moisture in and stops the soil crusting.
• You can use the same method for most leafy greens and herbs — asian greens, basil, mizuna, spinach — they all love a shallow sow and moist top layer.
• Don’t worry too much about spacing when sowing small seeds — just aim for even coverage and thin later if needed.
• Keep your compost pile going year-round. The mower-and-leaves method works surprisingly well if you don’t have time to layer it all perfectly. Once you have some beautiful compost, keep a bucket full to add to the next pile – it's a great activator.

That’s the Dirt From Me

This is a method that’s worked really well in my garden — it's simple, doesn't cost a lot, and it gives you a great harvest without needing much gear or planning. Lettuce, in particular, can be tricky in the heat, but it is doable.

Let me know what you’re growing in your raised beds, or if you’ve got a favourite lettuce variety that does well in a warm climate — I’m always keen to try something new!