Try some of these old-fashioned favorites in your greenhouse. White, lavender, or dark violet-blue flowers are delightfully fragrant. Blossoms appear in large clusters on stems 15 to 24 inches long in the dwarf varieties.
Heliotropes like rich soil and prefer night temperature of 60 F to grow, though 68 F minimum is necessary to germinate seed, which takes three to four weeks. Cuttings can be taken from mature plants; they root readily in moist sand.
'Marine', semi-dwarf variety with dark violet-blue flowers; 'First Snow', pure white flowers; 'Blue Bonnet', deepest blue.