White Hyacinth is turning brown—why
My white hyacinth is turning brown. Why and how do I fix it?
Certified GKH Gardening Expert
If the flower is older, it may just be fading naturally and that will cause it to brown. If it is fading sooner than you think it should, it is either lacking enough light or is over or under watered.
Move it to a brighter window and water the soil only when it is dry to the touch on the very top of the soil.