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Greenhouse, Garden & Allotment Blog

What to Sow and Grow in March

Posted by Alix Francis on 16th Mar 2018

What to Sow and Grow in March

March is an exciting month, the days are getting longer, lighter and warmer (depending on what the weather brings).

There are a lot of vegetables, fruits and flowers which can be sown in this month, some will be directly into the ground and some will be in the greenhouse.

It’s best not to try and sow If the weather has covered the ground in snow or frost, wait until it has cleared so the ground is fresh and more suitable for your crops.

Make sure the ground is well prepared and in good condition before you being sowing.

What vegetables to sow outside

Asparagus

This can be grown from seed or from ready to plant ‘Asparagus Crowns’. If you’re looking for an easy win, purchasing asparagus crowns is a simpler way to grow asparagus but if you’re up for a challenge, try growing from seed.

Beetroot 

If your soil has been well prepared over the last couple of months, now is the time to start sowing beetroot. Beetroot can be grown in low temperatures and harvested when they are around the size of a golf ball.

Broad Beans

These are great for an early summer crop if you start sowing them in March. If the weather is still cold in your area, protect them under a cloche.

Keep an eye out for pests such as blackfly and mice. Blackfly tend to gather around the growing tip. If you notice Blackfly, give the growing tip a little pinch.

Broccoli

If it’s not too cold you can start to grow broccoli outside, if you think it’s too cold or the weather is being a bit unpredictable you can grow broccoli under the protection of a cloche.

Cabbage

Sow summer or autumn cabbages outdoors if the weather allows. They should be sown into your well-prepared beds.

Cauliflowers

If you have raised cauliflower from seed indoors, these can now be planted out. Depending on the weather they might need to be planted under a cloche first.

Carrots

For the best results, sow carrots in light, stone free patches of your plot.

Garlic

If you haven’t sown any garlic already, March is your final chance to plant garlic for this year’s harvest.

Herbs

It’s best to sow herb seeds towards the end of march when it’s a little warmer although some herbs can tolerate low temperatures, covering them with a fleece blanket when a frost is due will help give them the protection they need.

  • Chives
  • Coriander
  • Dill
  • Fennel
  • Oregano
  • Parsley
  • Mint
  • Rosemary
  • Thyme
  • And so on

Lettuces

Lettuces can be sown if the weather permits, however it might be worth waiting until the end of March to get these sown outdoors. Sowing lettuce outdoors is the easiest method for the best crop. If the climate is still cold, sow them under a cloche.

Onions & Shallots

It’s best to buy onions & shallots in sets but you can still grow them from seed. Sets are the easiest way to grow onions and shallots. Don’t overcrowd the area you sow your seeds/sets as this can reduce the size your onions & shallots will grow to.

Peas

Peas can be sown directly outdoors in March. Like many vegetables, peas do best in the warmth and light of the sun in a well dug area with water retaining soil.

Potatoes

If you have chitting & sprouting your potatoes in February, you can plant out the sprouted potatoes in March. The key to growing potatoes is starting them off at the correct time of year.

What vegetables to sow indoors

Aubergines

Aubergines are renown for being a tricky but easy crop to grow. There is a simple hack to get a great crop of aubergines, give them time to grow in as much sunshine & warmth they can get.

Chillies & Peppers

Sow these this month for a fiery kick start. Chillies and peppers thrive in hotter climates, so by giving them enough time to ripen is key.

Cucumbers

Start cucumbers off from seed indoors to eventually transplant to grow outdoors. For the best results, get your seeds sown by the end of March.

Jerusalem artichoke

Plant Jerusalem artichoke in well-prepared soil in March or April from your local garden centre or online supplier. Be aware that these grow quite tall and may need some support, especially if they are exposed to windy sites.

Tomatoes

Begin sowing your tomato seeds in pots either in a warm greenhouse or on the windowsill. As long as they have warmth and light, you should get a good crop.

Fruit you can sow & grow in March


  • Apple and pear trees
  • Blackberries
  • Cranberries
  • Gooseberries and currants
  • Grape vines
  • Raspberries
  • Strawberries

Look out for these problems

Keep on top of these common problems

  • Aphids
  • Grey Mould
  • Mice
  • Pigeons
  • Slugs
  • Weeds

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Email us - info@norfolk-greenhouses.co.uk
Call us - 020 3011 2040

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