After new growth begins, feed the poinsettia every two weeks with an all-purpose houseplant fertilizer at the recommended rate.
Once autumn begins, the poinsettia should be kept in complete darkness for 15 hours each night. Owners can either take the plant into a dark room, or cover it in a large opaque box. Exposure to any kind of diffused light can delay the flowering process.
Many people keep their plants in a cupboard, but if light enters through cracks or it is opened, it will affect bud set.
During this time it is also necessary that your plant gets seven to nine hours of bright sunlight daily, so after bringing the plant out of the dark, choose a sunny place for it to live.