The ever popular snapdragon - show your grandchildren how the flowers talk - now comes in all sizes and types which, in very sheltered spots, will survive as a perennial. Sow seeds in pots or trays under glass at 18 degree celsius in February or early March. Seedlings are quick to emerge and can be pricked out in about 4 weeks. Plant out from early May, but watch for frosts, and they will provide flowers from July to September.