🌿 Tomato

Grow in deep, fertile, moisture-retaining, well-drained soil (rich loam is ideal), well amended with well-rotted compost or aged manure. Prefer a loose, well-aerated structure; avoid compacted soils and waterlogged sites (raised beds are useful in heavy clay). Target pH: slightly acidic to neutral, approx. 6.0-7.0. Maintain regular moisture levels with organic mulch and good drainage; avoid soils that crust or dry out quickly. Ensure adequate fertility (tomatoes feed a lot), but avoid excessive amendments rich in fresh nitrogen, which can reduce fruiting.

Sow indoors 6-8 weeks before the last expected frost. Use a fine seed potting soil; sow the seeds to a depth of around 5-10 mm, maintain regular humidity and keep the temperature at 20-25°C for germination, with good light. Transplant or pot once the seedlings have their first true leaves, and grow them in bright, cool conditions to prevent them becoming light. Harden them off for 7 to 10 days, then transplant them outdoors when all risk of frost has passed and nights are consistently mild (or plant them in a greenhouse earlier). Space plants 45-60 cm apart (more if very vigorous) in fertile, well-drained soil or large containers; water well. Bury the stem up to the first leaves to multiply the roots and obtain a more robust plant. Provide support (stake/cage/cord) for planting and maintain constant soil moisture.

Base fertilization on soil analysis whenever possible. Before planting, incorporate 2 to 5 cm of finished compost into the bed. At the time of transplanting, use a balanced fertilizer at a moderate rate (e.g. around 5-10-10 or 10-10-10) mixed into the planting area, or a slow-release tomato/vegetable fertilizer; avoid products with a high nitrogen content that favor leaf growth to the detriment of fruit. Once the plants begin to produce fruit (often 3-4 weeks after transplanting), proceed with a side-dressing of a low-to-moderate nitrogen, high-potassium fertilizer (usually 5-10-10), keeping the fertilizer a few centimetres from the stem and watering thoroughly. Repeat the treatment every 3-4 weeks until harvest if growth is moderate and leaves remain a healthy green; reduce or stop fertilizing if plants are excessively vigorous and flowering and fruiting are poor. In containers, nutrients are leached out more quickly: use a controlled-release fertilizer at planting and top up with a dilute liquid fertilizer (e.g. every 1-2 weeks) once flowering begins. Calcium supplements are generally unnecessary if soil pH and moisture are adequate, but care must be taken to ensure that calcium is available (avoid over-fertilization with potassium or ammonium nitrogen, which can interfere with calcium absorption).

After transplanting and once the soil has warmed up, apply a 5-8 cm layer of organic mulch (clean straw, shredded leaves or compost) around the tomato plants to conserve moisture, moderate soil temperature and reduce soil splashes that can spread disease. Keep the mulch a few centimetres from the stem to prevent rotting and discourage pests. In cooler climates or for earlier harvesting, black plastic or landscape fabric can be used to warm the soil; add an organic layer on top later if necessary to reduce heat stress and evaporation.

Use a sturdy support: a 1.8 to 2.4 m stake, a tall tomato cage or trellis/twine (spiral stake or twine connected to an overhead wire). Install the support at the time of planting to avoid damaging the roots. Form 1 to 2 main stems if you're using a stake or string, then tie the stem loosely every 20 to 30 cm with flexible ties (fabric, gardening tape) in the shape of an 8; never overtighten. As the plant grows, gradually add ties and keep fruiting branches supported; prune/eliminate excess suckers only if you're forming a single main stem on a stake/string.