Sick Rose? - Knowledgebase Question

Capitol Heights, IA (Zone 5A)
Avatar for mdgtt
Question by mdgtt
August 10, 2005
I have an Angel Face Rose, and with the Heat lately, I've tried to keep it watered. almost overnight, it seems it's started dying. One day it had blossoms and was nice and green, and then literally the next day, all the leaves browned and fell off. There are no more buds or blooms on the plant, and it's just a bunch of sticks in the ground. The stems are still green....and I tried fertilizing it a couple days ago, but nothing has changed on it. Any suggestions what has happened, and what I can do?

Answer from NGA
August 10, 2005
Sudden death is almost always associated with root problems. If you've eliminated all the obvious possibilities for the death of your rose bush, the plant may have fallen victim to a root rot. One of the most common root rots is caused by a fungus. Phytophthora root rot greatly reduces the volume of the roots, which are needed by the plant to absorb and transport water and nutrients. The roots on diseased plants are brittle and brown to reddish-brown in color. A network of fine, discolored feeder roots may be confined to one area or include the entire root system. The causal fungi usually colonize the crown of the plants, often girdling the stem at or just above the soil line. A brown to reddish-brown discoloration of the tissues occurs just below the bark and may extend up the stem above the soil line. Symptoms vary according to the degree of root colonization by Phytophthora root rot fungi, plant age, root-rot susceptibility, and environmental stress. It is not uncommon for some plants to remain almost symptomless until the disease takes over completely. For a positive identification of the problem, take a sample of the plant (including foliage, canes, crown and roots) to your local Extension office.

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