Tomatoes are a warm season crop. Start seeds indoors in a container of seed starting mix 6 weeks before night temperatures regularly reach 10C. Keep moist but not soggy and very warm 24-27C. When seedlings are 2-3 inches tall, transplant into larger individual containers.
When weather is warm and night temperatures stay above 13C, plant outdoors in full sun in rich, fertile soil. Provide tall, sturdy cages or stakes at planting time. Water consistently, Pick when fruits are fully colored up and give slightly to the touch.