Gardenia, Knock Out Roses
On our gardenias and our knock out roses .. When do you cut these back or prune them..... And could you please tell me the best fertilizer to use on hydrangeas and Iris and the knock out roses
Chilton County Alabama
Thank you for your question about pruning and fertilizing these plants. Each one has slightly different needs, so I'll group them.
Gardenias: here's a Clemson Extension article on pruning (and fertilization.)
Knock out roses: here's a U Maryland Extension article link.
Hydrangeas: I'm not sure what variety or cultivar you have, so here's another Clemson Extension article on many of them.
Iris: again, I'm not sure what type of iris you have, so here's an Extension article on their care, including fertilization.
I hope these are helpful to you. Good luck!