- In cold regions with fewer growing days, select early varieties of tomatoes that mature in 50 to 65 days from planting, such as ‘Early Girl', ‘Early Pick', ‘Moskvich', ‘Daybreak', ‘Oregon Spring' and ‘First Lady'.
- Tomatoes hate competition. Give each plant enough space to extend its leaves without touching another plant.
- Always irrigate tomatoes from below. If frequent late-summer rain causes cracking of fruit, grow split-resistant varieties: ‘Basket Vee', ‘Bellestar', ‘Duchess', ‘Heinz 1350', ‘Juliet' or ‘Juliet Hybrid', ‘Marion', ‘Park's Whopper', ‘Pilgrim', ‘Spitfire', ‘Summer Sweet', ‘Sunbrite', ‘Sunmaster Hybrid', ‘Sweet Million', ‘Sweet Gold' and ‘Sweet Orange'.
- Mix homemade garden compost or composted manure in the soil and supplement with liquid fish or kelp emulsion every third week. Avoid high amounts of nitrogen, as it will encourage leaf growth at the expense of flowers and fruit.
- Provide a container at least 30 to 60 centimetres wide, depending on the potential size of your plant.
- Select a dwarf variety, with heights from 45 to 75 centimetres; determinate varieties, which stop growing when they reach a specified height of 90 to 100 centimetres, also do well in containers.
- Use a growing medium composed of two parts soilless mix, one part garden compost or composted manure and one part coarse builder's sand.