How to Turn a Poinsettia Red?
To turn a poinsettia red, you need to start in later winter/early spring. When it’s done flowering, cut the poinsettia back until just less than half a foot above potting soil. Yo will want to wear gloves to do this, as the sap can be an irritant. In May or June, repot to a larger pot. Make sure to stop new growth, by pinching. Feed biweekly during June, July and August. They can handle indirect light during this time. In early October, start giving your poinsettia at least 12 hours of darkness. There must not be any light available during this time. In about 2-3 months your poinsettia will start having showing its colored leaves.
