Your Sustainable April Gardening Checklist

• Plant second-early and maincrop potatoes by the end of the month, adding compost or well-rotted manure to rows to improve soil fertility naturally
• Sow outdoor varieties of tomatoes, chillies, and courgettes in pots using peat-free compost, reusing trays and containers where possible
• Continue planting asparagus crowns and Jerusalem artichokes as long-term perennial crops that reduce annual soil disturbance
• Make successional sowings of salad onions, lettuce, radish, and rocket under cloches or frames for continuous harvests and reduced waste
• Sow fast-growing crops like radishes to maximise space and keep soil covered, reducing weed pressure
• Sow carrots, beetroot, and peas directly outdoors in well-prepared beds, using fleece or organic protection methods where needed
• Sow kohlrabi and herbs such as parsley, coriander, dill, and chamomile to support pollinators and biodiversity
• Feed spring cabbage, overwintering onions, garlic, and shallots with organic feeds such as nettle tea or compost-based fertilisers
• Protect seedlings from slugs and snails using beer traps, wool pellets, hand-picking, and other chemical-free methods
• Use cardboard collars around brassicas to deter cabbage root fly, reusing household materials instead of plastic
• Pinch out broad bean tips if aphids appear, or treat with mild soap spray to avoid chemical intervention
• Sow companion flowers such as pot marigolds and borage to encourage pollinators and natural pest control
• Thin seedlings carefully and compost thinnings to recycle nutrients back into the system
• Transplant broad bean seedlings and protect young plants with fleece during cold spells
• Tie in new growth on trained fruit trees using reusable supports to avoid plant damage and waste

April is a key transition month for greenhouse growing, where careful management helps harden plants off and maximise space efficiently.

• Sow tender crops such as tomatoes, chillies, peppers, aubergines, and courgettes in peat-free compost under protection
• Use reusable seed trays and pots where possible to reduce plastic waste and long-term cost
• Maintain good airflow in the greenhouse by opening vents on warm days to reduce disease and fungal issues naturally
• Water seedlings carefully in the morning to reduce evaporation and prerent damp-related disease overnight
• Prick out seedlings promptly to prevent overcrowding and reduce wasted plants
• Begin hardening off young plants gradually later in the month to reduce transplant shock and losses
• Start climbing beans and squash indoors only if space allows, prioritising efficient use of heated or protected areas
• Clean greenhouse glass and staging to maximise natural light and improve plant health without artificial inputs
• Check for pests such as aphids and whitefly early, using biological controls or gentle soap sprays where needed
• Organise greenhouse space to prioritise young, sensitive plants and avoid overcrowding, improving airflow and plant resilience
• Reuse capillary mats, pots, and supports to reduce waste and improve watering efficiency