Posted by MEADOW VIEW on May 05, 19100 at 21:07:39:
In Reply to: Roses and Black Walnuts posted by Melinda Goplin on May 05, 19100 at 11:08:17:
: Hello, A fellow teacher is having problems growing Hybrid Tea Roses in a flower bed located about 10 feet from where an old Walnut tree use to stand. It blew down in a wind storm last summer. My Agriculture class is testing the soil and trying to come up with a recommendation for him. So far, the soil seems to be very low, only showing trace amounts of N,P,K. How much fertilizer to roses require? Is there any way the Walnut tree could be affecting their growth, even though it isn't there anymore. Any information or additional websites I could have my students visit would be very much appreciated. Thank you!
MELINDA: Walnut trees do have a negative effect on many plants that are planted near them. This toxicity remains in the soil for a period of time, and I do not know how long.
Roses are heavy feeders and require feeding about once a month during the growing season.
I would not try to plant anything in this area for a year or two and then try some sensative plants before trying to landscape the area.