Tomato San Marzano is the best plum tomato. This tomato is a famous Italian variety which has been grown by connoisseurs over a century. These are perfect for cooking with as they have a rich and intense flavour and a low water content. This plant can be grown outdoors or indoors but for the best ripe fruits we recommend growing in a greenhouse.Pot up, and grow tomato plants on in warm frost free conditions until large enough to plant outdoors. When all risk of frost has passed, gradually acclimatise them to outdoor conditions over a period of 7 to 10 days.Choose a sheltered position in full sun on fertile, reliably moist, well drained soil, and transplant at a distance of 60cm (24") apart. Alternatively grow tomatoes in patio bags and containers in good quality compost such as John Innes No. 2. Drive a (5') cane into the soil adjacent to each plant to support them as they grow, and tie each main stem to its support with soft garden twine.Water tomato plants frequently, to keep the com