This is a very big annual. It grows to waist high with deep blue flowers. It is very useful for bank stabilization as it has a 3 foot root system. Deep blue and white flowers in summer. The white part turns purple when the flower has been pollinated.
The best is to plant them in late winter just after the ground has thawed since the cold helps them sprout. If planted in the fall some seeds will sprout in the fall while most will come up in the spring. To get them going in late spring or summer soak them in water overnight, this will make the seeds swell up and start the growth of the seed. Transplanting is said to be difficult but the sources say that small plants can be easily moved if you keep a lot of soil around the roots. This has not worked well for me, and i use egg boxes to start the seeds, one in each whole, cut the box in 12 pieces once the seedlings show up and plant the whole little pot into the ground. The egg boxes will rotten by the time and keep cutworms away from the young roots.