Forcing requires 3 months of 60 degree nights and 65 to 70 degree days. A soil pH is between 4.5 and 5 and little or no phosphorous gives blue flowers. Pink flowers result from a soil pH of 6.3 to 6.5 and high levels of phosphorous. Pruning is done after flowering. If terminal buds are injured or pruned off the plant will not bloom.
Propagation is by stem tip cuttings taken from non- flowering shoots.
Take cuttings any time between April and August. Each cutting needs 2 to 3 pairs of leaves. Make the cut across a node. Cuttings can be rooted in a cold frame during the summer. Visuals associated with this text.