Thompson & Morgan

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What to sow and grow in the garden this month

What to sow and grow in April


Find out what to plant in April with our seasonal list of flowers, fruit, vegetables and seeds. These can be ordered now for sowing, growing and harvesting over the coming months!


Flowers to sow and grow


    in the 

greenhouse greenhouse  In the greenhouse / indoors


  • Sunflowers can be sown now in pots indoors or direct sown into garden borders.
  • Nasturtiums can be sown in pots and modules now. For the best flowers plant out in poor soil after all risk of frost has passed.
  • • Finish sowing Petunia seeds under cover this month to ensure the plants reach a good size in time for the summer.
  • • If you're looking to attract bees and butterflies to your garden this year sow some Scabiosa seed under cover now. They also make great cut flowers!
  • • Sow marigolds now in warmth to brighten up your summer bedding.
  • • Finish sowing summer bedding plants such as Salvia, Ageratum and Zinnia this month to ensure a vibrant display this summer.


  • direct sow outdoors seed packet  Direct sow outdoors


  • • Direct sow Calendula seeds now - they are ideal for the vegetable garden, attracting insects and providing edible flowers.
  • • Direct sow wildflower seed mixtures - they're great for bees and butterflies and they add colour too.
  • • Try growing comfrey in a neglected corner of the garden - it can be used to make fertiliser or for mulching, and is a rich source of nutrients.


Fruit & Vegetables to sow and grow


    in the 

greenhouse greenhouse  In the greenhouse / indoors


  • • Sow aubergine seeds under glass now for growing in the greenhouse or transplanting outdoors later on.
  • • Sow basil seeds in warmth now to protect them from frost.
  • • Finish sowing celery and celeriac seeds under glass.
  • • Start to sow courgette, marrow, squash and pumpkin seeds under cover.
  • • Sow cucumbers and gherkins towards the end of the month, sowing the seeds in individual pots or modules in the greenhouse.
  • • Start kale seeds now under glass or directly into seed beds outdoors.
  • • Try sowing lettuce in module trays under glass for transplanting in the garden later. Alternatively sow direct outside and thin out the seedlings.
  • Melons are surprisingly easy to grow. Try sowing 'Orange Sherbert' in warmth for a reliable crop in the British weather.
  • • Sow seeds of perennial herbs such as rosemary, sage, thyme and lemon balm in the greenhouse.
  • • Sow runner beans and french beans under cover at the end of the month, sowing individually into module trays.
  • • Now is your last chance to order strawberry plants for the coming season. You can also sow strawberry seeds in the greenhouse now.
  • • Start off sweetcorn seeds now in modules under cover for planting out after all risk of frost has passed.
  • • There is still plenty of time to sow sweet pepper seeds in the greenhouse for bountiful summer crops.
  • • Start to sow tomato seeds indoors, ready to plant out after all risk of frost has passed. If you're struggling for growing space buy ready-grown tomato plants.


  • direct sow outdoors seed packet  Direct sow outdoors


  • • For something long-lasting in your vegetable plot try direct sowing globe artichokes outdoors. Now is the perect time to sow seed. Tubers of Jerusalem Artichokes can also be planted out now.
  • • Sow beetroot seeds directly into well prepared seedbeds outdoors.
  • • Sow broad beans directly into the ground for a delicious summer crop.
  • • Start sowing Brussels sprouts, calabrese and broccoli directly into seed beds outside.
  • • Direct sow summer and autumn cabbages such as 'Greyhound' into well prepared beds outdoors. Towards the end of the month, cauliflower seeds can be sown outdoors too.
  • Chicory seeds can be sown directly into seedbeds now.
  • • Sow herbs such as chives, coriander, dill and parsley directly into the ground or in containers indoors.
  • • Direct sow carrots in rows outdoors, making sure the soil remains moist for good germination.
  • • For something more unusual try sowing kohl rabi outdoors - it will be ready in as little as 8 weeks after sowing.
  • • Finish sowing leeks in their final positions outdoors.
  • • Direct sow some pak choy outdoors for a taste of the orient.
  • • Sow your parsnip seeds outdoors now. Sow 3 or 4 seeds every 20cm and thin to the strongest plant.
  • • Sow peas directly into the ground, or start them off in modules if mice are a problem. Stagger sowings over several weeks, allowing about 20 plants per person, for a longer harvest period.
  • • Sow radish seeds directly into the soil for your first salad of the season.
  • • Continue to sow spinach seeds in seedbeds enriched with plenty of organic matter.
  • • Sow spring onion seeds in drills outdoors for a quick crop to add to salads and stir fries.
  • • Start to sow swede seeds outdoors in a rich fertile soil.
  • • Try Swiss chard sown outdoors for a colourful crop - they even look great in flower beds!
  • • Try growing your own watercress in containers on the patio, making sure the container is sitting in 2-3 inches of water at all times.
  • >

    plant outdoors trowel  Plant outdoors


  • • Plant out asparagus crowns in well prepared permanent beds.
  • • Plant out chitted seed potatoes approximately 10-15cm below the soil surface or in potato planters on the patio.
  • • Plant out onion sets, shallot sets and garlic cloves for crops this summer. Now is your last chance to order onion, shallots and garlic for spring planting.
  • • Plant out pot-grown fruit trees and bushes.
  • • Continue to plant raspberry canes and blackberry canes before hotter weather arrives.