How To

April’s Promise: What to Sow in April UK

April in the garden feels like momentum — the stretch from tentative to certain. The soil warms, the sun gains strength. I can finally push hands into earth with less hesitation.

March 11, 2026
Author: Henry Kimber
Pricking Out Seedlings
Herboo Seeds

April in the garden feels like momentum — the stretch from tentative to certain. The soil warms, the sun gains strength. I can finally push hands into earth with less hesitation.

This is the month when my seedlings — started indoors back in March — are ready to prick out and strengthen. Cosmos and zinnia’s blousy colours begin in trays, later to light the borders with a splash of pinks and reds. Dahlias too, slow but worth the wait.

Outdoors, there’s more to sow directly — carrots, parsnips, beetroots — roots that need deep, loose soil. Lettuce joins the parade, crisp and quick, great for keeping late spring salads fresh. A sowing calendar feels less exact in April — weather varies, but the spirit of growth is clear.

Herboo Seeds

Outdoor Sowing Picks for April

  1. Carrots: patience is key with these roots
  2. Parsnips: deep soil, generous space
  3. Beetroot: robust, earthy-sweet
  4. Lettuce: fresh and fast for salads
Herboo Seeds

Planting and Pricking Out Seedlings Indoors

Pricking out is the month’s small ceremony. I gently tease rows of tiny cosmos from crowded trays into bigger pots. The change of space lets them build strength. Watching those stems go from flimsy to steady is a small, steady joy.

Sunflower Seedlings in Pots

Seasonal Tips for April Sowing

Start watering seedlings carefully — indoor moisture can dry quickly. Outdoor sowings may still need protection from late frosts or heavy rain. Cover with fleece or cloches if uncertain. Remember, April is still spring — expect ups and downs. This is the turning point in the season. Where soil and seed finally agree.

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