David K- I would love to see your tutorial to know how to grow sp, every year I sow in the spring as I never knew they would cope with the cold until now. I sow them in root trainers, then when planted out I give them plenty of compost and water well, but they never seem to do very well compared to others I've seen. They do not grow very tall only about 1-2 foot, and even though I pick the very few flowers and do not get that many more. So your knowledge would be very much appreciated.