I received an anthurium last September. I have had one bloom that never turned red but stayed green. When should I plant it in a bigger pot?
As for the green bloom, are you absolutely sure it's supposed to be red? Some are bred to be green. That being said, a colored one that changes to green, or never turns colored, may have insufficient light, or the minerals may be too high or too low. Also sometimes they're green for no apparent reason. This article has good information on growing anthurium: https://www.gardeningknowhow.com/houseplants/anthurium/anthurium-care.htm