Tag Archives: horticultural oil

Flowering Almond

Tree is covered with buds in early spring when I use dormant oil before they open and any sign of the pink flower and on the trunk as well. I spray the trunk only once on another occasion, You can…

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…

Viburnum Half Dead?*

Hi there, I have a mature viburnum that flowered beautifully this spring and half of it is suddenly dead i think even though when I snap the twigs, they are still green inside. One half has berries forming, and the…