Can you cut down an itoh peony in June?

My itoh peony is full of powdery mildew. It is beyond the prevention stage. I am worried it may spread to the phlox nearby. Can I cut it to the ground in June after blooming, or do I have to…

Gardenia – black spots

Hi there, I’ve read your other posts (as well a lot on the internet) to try to figure this out without success. I recently purchased a gardenia plant from a local garden center. There were a few of them that…

Gerbera Plants. flowers twisted,

Plants, same pots now as last summer. Purchased separately, planted in 3 pots. Sat in a North window and blossomed all winter. Spider mites treated with dish soap in a gal. of water, thorough spray then showered off. Roots seem…

Clematis leaves dry up

My Clematis leave all dried up? What might have caused the problem. Will this spread to other plants such as lily? What kind of soil is good for clematis. I added some wood ash to the soil, is woo-dash good…

Yellowing delphinium leaves

Last week I bought a large and very vigorous-looking delphinium. The pot ‘s diameter and depth are both 85 cm. / 8.5 inches. It’s about to bloom in a burgundy colour. The leaves are strong with a dark green colour.…

Disease in an old Prunus shrub

I am asking about disease in an old shrub 8 ft tall, identified on Picture This and on I Naturalist as Prunus, or Plum Cherry. It had prolific white blooms on either side of and close to the stems this…

Sick Tree in Back Yard

We have a tree in our mostly sunny backyard in the Danforth area. Over the last couple of years it has started to look more and more sick. We enclose a picture of what some of the leaves are looking…

Shanghai baichoi

My Shanghai Bokchoi leaves are turning yellowing . What might cause the problem?…

Something killing our plants

There is something (blight perhaps?) killing our well established backyard plants. There appears to be small bugs all over our Mandarin honeysuckle but it is still doing ok, but the lilac bush beside it barely came back this year ans…