Autumn Joy stonecrop leaves turning white

I bought 4 small Autumn Joy plants, 2 of which I planted in the ground. The 2 in pots have a white splotchiness on the leaves. What is this and what shroud I do about it?…

mildew on peonies

I have several peonies. Several, but not all, are covered with white mildew. Will this weaken/kill the plant. What can I do to prevent this. I have cut off the deceased stalks and cleaned up the area from any debris.…

Peony Transplant Query Following Deck Demolition

Last summer I transplanted a Peony bush, but it didn’t bloom this fall. The attached photo shows the transplanted stalks as dried and white, under the metal tripod with reddish metal suports. Should I just wait another season to see…

everblooming lilacs

I have two everblooming lilacs which were professionally planted last year in a large planter on my terrace. This spring they had lots of blooms and were lovely. They now however look bedraggled and did not bloom again. Their leaves…

Powdery mildew on my trumpet vine.

I live in north Toronto and have a 10 year old trumpet vine Growing on my iron fence, so it gets plenty airflow. Sun in the morning until 1:00PM, then shade. What can I do to avoid the spread? Is…

parsley

Hi, not sure why there are white spots on my parsley? it’s planted in a pot ( balcony), gets 4-6 hours of sun. I don’t see any bugs crawling……

What disease are my newly planted beech trees having?

I had a landscaper plant 5 Dawyck (columnar) European beech trees for me along a tall concrete retaining wall to form a hedge. There’s plenty of space for the trees to grow. The planting was done about 6 weeks ago…

Lilac Shrub in Distress

Hoping someone can help me with my well established lilac shrub. Its had some powdery mildew for the last couple years and last year some of the foliage turned a rusty colour, some curling and dying and there was a…

Will Dormant Spray Prevent Powdery Mildew on Ninebark?

Hello – I have a lovely purple ninebark (could be diablo) and the last couple of years it’s suffered badly from powdery mildew which I didn’t detect until it was well advanced. I wondered whether (a) applying dormant spray now…