Choosing What To Sow In March is Easy With This List. Check It Out, Choose Your Favourites & Sow Your March Fruit & Vegetables Choices

What To Sow In March: Radish

Radish Can Be Sown In March and throughout the year

The following seeds and plants are what I’m going to be sowing and planting in my UK garden in March. However, this is a guide only. I’ll be flexing sowing dates subject to the weather and other factors. For example, if we get a cold snap and the forecast is better a week later then I’ll wait the week so that the seeds have the best possible conditions for the time of year. Choosing What To Sow In March is key to the whole gardening year if starting now. 

And don’t forget I’m in Sidmouth, Devon. My last frost date dictates a lot of what I do. You may need to adjust for your location and temperatures.

Vegetables Grown The Non Traditional Way

Often I get people say I am sowing various crops too early or out of season. And in one sense these people are correct IF I intended to grow them conventionally or for traditional reasons.

So, for example, I could sow beetroot on Christmas Day and people will say that it’s too early. And for growing conventional roots they are correct. But when I sow beetroot in December it is for leaves. Beetroot leaves make a tasty and colourful salad leaf when sown any month of the year! Lots of other veg crops can also be used in non traditional ways.



March is a good time to start aubergine if you have a cold (unheated) greenhouse to plant them in. I’d delay a couple of weeks if you intend to plant in polytunnels as they are often colder than glass …. and i’d wait even longer for outside plantings.

What to sow in March
What to sow in March : Aubergine

There’s no rush with aubergine as later sown seeds often catch up those sown a tad too early. 

Interestingly my colleague Keith prefers to sow aubergine earlier in March rather than later. So maybe try both early and late!


Cheltenham beet are a long tapering variety resembling a parsnip. They yield well. But most of us grow standard globe type varieties. These now come in assorted colours as well as the standard red beetroot. Some even exhibit a concentric circle pattern when cut open. 

Broad Beans

Though they can be sown in November and throughout the winter there’s still time to get in one more sowing. Later sowings are however more prone to Black Army infestation .. ie aphid attack. The best remedy if you get it is to just pinch out the growing tips of the plants. 


Cabbage for summer/autumn harvest can be sown in March.  They can be ready for harvest in late June or July with good growing conditions.


Celeriac need a long season so sow the seed under cover now. I prefer them sown in modules as they transplant so much easier. And as Keith reminds me, don’t cover the seed with compost. They are minute, at least 17,000 to the gram. And they need light. A bit of glass or cling film over the tray might help if they are prone to dry out. But don’t encourage moulds!


Celery don’t need such a long season as celeriac but can be sown in March. When I grew them commercially I sowed in February and would be planting them outdoors in March/April. They are very hardy. See above for covering the seed with compost .. don’t/

Brussels Sprouts 

Winter brassicas need a long growing season. So sowing now is ideal. You can sow a few undercover but later in March there’s no reason not to sow a seedbed full outdoors. They are usually much better quality plants when sown outdoors. Personally I prefer bareroot plants to module sown as they have a bigger root system.

But watch out for flea beetles, slugs and butterflies. 

Capsicum (Peppers)

For cold glass and plastic this is early enough to sow, In fact later in the month rather than earlier is my advice if you are a newbie. Commercially I grew them in polytunnels after an earlier lettuce crop and would transplant on May 7th on my Bedfordshire market garden. Again this is a crop that my colleague Keith prefers sowing earlier in March rather than later. Much will depend on how fast they grow , which is dependent on the conditions you give them


I’ve been sowing indoors for a few weeks now but March is a good time to sow outdoors. Sow every 2-3 weeks for succession and be careful in selecting your varieties. The long cylindrical varieties need deep stone free soil. If your soil isn’t perfect, go for the stumpier varieties or even the “round” types. 


Cauli also needs a long season. So, depending on the variety and harvest season, you can sow now. Some varieties are sown in summer. Check the variety.


The true aficionados will tell me it’s too late for chillies. But for unheated glass and plastic houses now is a good time. There are lots of varieties and colours to choose from. 

Chinese cabbage

Once the weather gets warm the chances of Chinese cabbage bolting increases. But this doesn’t worry me as its still possible to get a good crop and even if they bolt you can still harvest and eat them. Many Oriental grocery shops sell them in flower, so if its good enough for them it is also good enough for me.

Green Manure

If you have land that is empty and you aren’t planting anything in it for a few months then why not sow a quick green manure crop? For example, I’ve just cleared one bit of ground and will probably put my leeks in it in late May. So I can sow green manure in early March, let it grow and feed the soil microfauna and then plant my leeks when I’m ready.

Killing off the green manure is relatively easy. I can hoe it on a sunny or windy warm day and it’ll die very quickly. Hoeing leaves the roots in the ground and as they rot down they leave micro channels in the soil that will aid drainage. Plus the worms will love devouring the dead roots and will create more soil porosity as they pull dead organic material into the soil.


I’m going to include a whole host of herbs here rather than list them individually. Go for coriander, basil, oregano, sage, rosemary, parsley, lemon balm, thyme etc now. Some of these can be sown in future months as well as they are short lived, eg basil and coriander. 

And don’t forget coriander can be sown for leaf or seed. Just choose the variety best suited for the purpose. 

Technically not all the plants in my herb list are herbs. The linked article explains why  

We Aren’t Finished What To Sow In March Yet .. More Below.

Kohl rabi

They need early sowing and plenty of irrigation to do really well. But now is a good time to start them in a greenhouse or cold frame. 


Although I sow lettuce every month, March always feels like a new season.  The choices are wide … go for Cos; Buttehead; true Crisp lettuce and Lakeland types; Little Gem types of miniature Cos  mixed leaves etc. 

Cos is my favourite and I prefer Lobjoits Green Cos to other varieties. If grown well they can weigh as much as a pound or pound and a half! I used to grow my early crop of Cos “under plastic” ie in large polytunnels. We sowed enough to plant 10,000 at a time. and harvesting took days. 10,000 plants would give us at least 800 boxes of Cos to be sent to local shops, wholesalers and London commission markets. It was hard work but worthwhile when the sun shone. If we had a lot of wet weather when we were harvesting then no one wanted to eat lettuce and prices rapidly dropped. On occasion no one wanted to buy them and we had to compost them. It sounds heartbreaking, and it was, but growers of salad crops rarely have a confirmed sale until the day. Supermarkets always want them when the weathers right but as soon as it rains they find an excuse to reject them!

The more on How to Grow Lettuce here. 


Micro herbs can be sown all year indoors and in many cases in an unheated greenhouse. So now is as a good a time as any other to sow them.


I love this little salad veg. The leaf shapes intrigue me and it tastes so good.


Mooli are a type of radish. It goes under various names including daikon and Chinese radish. There’s more info on how to grow it if you follow the link.


Seed direct into the soil in rows or go for multi-seeded modules. As you might have guessed I prefer the latter.


Parsnip need a long season but are best direct-sown in situ. If you put them in modules there is a very strong chance the roots will twist around the inside of the module and never grow straight once planted.   Its not impossible to get good parsnips this way but dies need more skill.


For pods, mangetout or peas shoots, sow now and every few weeks. The careful planners will have had peas all winter for shoots and may even have an overwintered crop coming into flower before long. Peas are tougher than most people think. They stand a frost and even snow.


Chitted or not potatoes can be planted this month in most areas. On the cliffside “plats” near me in East Devon there are records of them being planted in February. As we go inland and gain altitude the date gets later. On the coast frosts were very rare, whilst inland they become more common. So base your planting dates around your predicted last frost date. Clearly you can plant before the last frost as the potatoes will come to no harm whilst still underground. But they can get caught by the frost once above ground. A touch of frost isn’t going to do much harm. Even if they get cut right back by single frost they will still regrow, but of course they will be later. If you plant much too early, and they get multiple bad frosts, they will of course die!

It’s a bit of a balancing act, getting the planting date and last frost lined up. But growing shouldn’t be a race so don’t worry if you are a few days behind your impatient neighbours.


I’ve been sowing radish all winter but March is also a good time to sow them. Sow every few weeks to get a succession of crops. 

Rhubarb seed

The seed catalogues say now or even as late as April. I’ve ignored them and sowed mine in the autumn. But if you didn’t, now would be a good time. I find Victoria is a good variety to grow from seed. Keith recommends Gaskin’s Perpetual and Champagne.


I start Rocket in modules for transplanting, but you can direct drill (sow) if you wish. 


There’s still time to sow shallots outside or in modules. Multi-seeded “Figaro” shallots did me very well in recent years. Figaro are a banana shallot and I like them as they are easy to prepare in the kitchen. It’s as well to remember we have to prepare and eat what we grow. 

We are Getting to The End of What To Sow In March …What Comes Next?


Where do I start? There are several types to try and I’ve not tried them all yet. We eat spinach raw in salads or cooked in dishes such as Saag aloo.  go for the heat tolerant varieties that resist bolting. Example Amazon, Mediana and New Zealand.

Spring Onion

Sow now and every 3 weeks to get a long succession of spring onions. My favourite variety is White Lisbon. 

Direct sow in the soil or multi-sow in modules. I prefer the latter as it means I can pack more crops per bed each season.  


Tatsoi are prone to bolt if they get too cold. But if they are spring or late summer sown they are fine. They do however tolerate a light frost .. just not prolonged cold.  So are ok if the conditions are not too cold.


There’s still plenty of time to sow toms. I confess I did sow mine a few weeks ago and they are just showing the first true leaf. But it’s mild in my area and I’ve grown well over 100,000 toms in my time. Once I need to plant mine out in the unheated greenhouse I’ll be covering them with fleece at night if need be. AND there is a chance they will die on me. So I’ll be sowing a few more later .. just in case. 

The range of toms available today is huge. It’s now possible to buy grafted plants but I’m far from convinced that they are of any value whatsoever to gardeners. Even with my experience I’m not going to waste my money on them as they only perform well when given optimum conditions .. and in gardening situation that is rarely possible. 

Are Grafted Vegetable Plants, Such as Tomatoes, Worth The Extra Cost
Are Grafted Vegetable Plants, Such as Tomatoes, Worth The Extra Expense

As for the range of tomatoes, choose from cherry, traditional, beefsteak etc, in a range of fancy colours. 

I steer clear of F1 hybrids and go for the older heritage varieties as they tolerate garden conditions much better and have better flavour. With good conditions they also yield very well. 

My two favourites are Moneymaker and Gardeners’ Delight. Old varieties are still available for a reason, .. they are good varieties that deliver on flavour and yield.  



For leaves and/or roots now is the time to start sowing. Some varieties can go much later to give succession.


Watercress is easy to germinate and simple to grow. I start it in recycled grape punnets and then prick them out into additional punnets, just 3-4 plants per punnet. Initially, I just keep the compost moist but from the first true leaf stage, I stand the trays in a shallow tray of water.  They respond well to warmth unless it gets very hot and growth is rapid once they have a few true leaves. After that just harvest a few leaves as you need them.

The leaves are wonderfully peppery and add an extra dimension to salads. 

Want More What To Sow In March Ideas?

Is This All I sow in March?

No, I’ll be adding a few more things over the next few days.

And don’t forget the daily info I put on my Facebook Group.

Many thanks to Cumbria based Keith Wheeler for checking this page and offering some additional advice. Keith, like me, was commercial grower. In his case he grew plants that were sold in major garden centres etc., so has a vast experience of seed sowing and young plant growing. Both of us now grow in our gardens and understand the difference between commercial practice and gardening.

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4 thoughts on “What To Sow In March

  1. Suzanne Davis says:

    Hi, what green manure plant can I grow now (January) I want to use the bed in May for either peppers of Squash.

  2. Snoop says:

    I’ve given up on Gardener’s Delight. I used to grow it every year, but the last two years (new seed both times) it’s been disappointing. Not the growing conditions, I believe. Anyway, last year I tried Rose of Berne as an experiment and I won’t bother with GD again. Rose of Berne is small to medium, thin-skinned, open-pollinated, early to harvest, good cropper, fantastic flavour and a very small green core. Might be worth an experiment for you.

    1. Stefan Drew says:

      It might indeed though I’ve has good crops of GD and have trialled hundreds of varieties under strict conditions. There’s always a better one somewhere if we keep looking.

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