🌿 Tomato

Plant in fertile, deep, well-drained soil, enriched with compost or well-decomposed manure. The soil should retain moisture but be aerated (avoid compaction and waterlogging); raised beds are useful where drainage is poor. Ideal pH: slightly acidic to neutral (approx. 6.0-6.8). For containers, use a high-quality potting mix with added compost; maintain regular humidity and mulch to reduce drying out and splashing of the soil.

Sow tomato seeds indoors 6-8 weeks before the last expected frost. Use a sterile sowing mix; sow to a depth of 3-6 mm (1/8-1/4 in), maintain regular humidity and keep the soil warm (approx. 21-27°C / 70-80°F) with bright light after emergence. Re-pot seedlings when they have true leaves. Soak for 7-10 days, then transplant outdoors only after all risk of frost has passed and nights are regularly above ~10°C (50°F). Plant in full sun in fertile, well-drained soil. Plant deeper than they grew in the pot: remove the lower leaves and bury the stem up to the first leaves to encourage rooting and plant strength. Space plants approximately 45-60 cm (18-24 in) apart (more for vigorous indeterminate varieties) with 75-90 cm (30-36 in) between rows; provide a stake or cage at planting. Water deeply after transplanting and maintain constant humidity; mulch once the soil is warm. In very hot climates, seeds can be sown directly after the soil has warmed up, but transplanting is generally more reliable.

Wherever possible, fertilization should be based on a soil analysis. Before planting, mix 1 to 2 inches (2.5 to 5 cm) of finished compost into the bed and incorporate a balanced vegetable/tomato fertilizer; avoid excess nitrogen, which favors leaves at the expense of fruit. When transplanting, use a low-nitrogen starter fertilizer (usually higher in phosphorus, e.g. around 5-10-10) placed and watered according to label instructions. Once the first fruits begin to form, apply a side-band of tomato and vegetable fertilizer or compost and repeat every 3 to 4 weeks during the main fruiting period, keeping the fertilizer a few centimetres from the stem and watering after application. In containers, use a controlled-release fertilizer at planting or feed with a diluted liquid fertilizer regularly (often once a week or every two weeks), choosing a formulation containing a moderate amount of nitrogen and a higher amount of potassium during the fruiting period. If plants are very dark green and leafy, with little flowering, reduce nitrogen inputs; if growth is pale and weak, modestly increase feeding while maintaining regular humidity.

Mulch tomatoes once the soil has warmed up and the plants are established. Apply 5-8 cm of clean organic mulch (straw, shredded leaves, thin layers of untreated grass clippings or compost) to the root zone to conserve moisture, suppress weeds and reduce soil splash that can spread disease. Keep mulch a few centimetres from the stem to prevent stem rot and discourage pests. In cool climates, black plastic or landscape fabric can be used early to warm the soil, then covered with organic mulch as temperatures rise.

Use a sturdy support system: a 5- to 7-foot stake (wood/metal), a spiral tomato stake or a trellis with string. Install the support at planting time and tie the main stem as it grows, using flexible ties (fabric strips, tomato clips) in loose 8-shaped loops to prevent girdling. Add ties every 20 to 30 cm of growth and keep the stem straight; for trellis/twine, run the stem up the twine and secure regularly. Check ties throughout the season and loosen/replace as stems thicken.