We've been growing these tomatoes in the greenhouse for several years now, with great success - 100% germination, string growth, heavy yield and a terrific tasting tomato to cook (sauce is fabulous!) or eat raw. Despite the usual 100% germination rate, the seedlings didn't do well when they were potted on. We think the compost we bought from a local garden centre might well have been last year's stock. However, the plants have made a spectacular recovery after an Epsom salts foliar spray and are growing very well in gro-bags now - phew, tomato emergency averted!!!