Reduce bottom heat to prevent stretch once the cuttings are rooted. Once rooted fertilize to maintain color. You can use Cycocel at 1500ppm spray to prevent stretch and hold color in propagation bench. In the propagation bench provide about 12-15 sq. Finishing the crop.
Cultivars require different lengths of time from initiation to bract development.
2 a.m. mum lighting 10 fc beginning Sept 1. Poinsettia flowering can be delayed by as little as 1-2 fc. Use blackcloth beginning about Oct 1 for a minimum of 3 weeks depending on pot size to insure that the poinsettias will initiate uniformly and not be delayed. After that time days should be naturally short enough for normal development. N and K rates can be reduced to about 100-150 ppm N and K if the crop is being subirrigated.