Blue Morning Glory - Ipomea Blu. The original and still the prettiest morning glory. As blue as a summer sky. Grow along a fence or trellis since they need something to climb. Easy to grow. Soak seeds 24 hours before sowing. For transplants, begin 3-4 weeks before last frost, sowing 2-4 seeds per cell and thin to one. Transplant after all danger of frost is over at 9-12 inch spacing. For direct seeding, sow 1-2 weeks after last frost date. Sow 1/2 inch deep, 2" apart and thin after germination. 5 gram packet, approximately 150 seeds.