Ask Categories: Herbaceous Perennials; Cultivar/Species

Russian Sage (Perovskia atriplicifolia)

I cut them back to just above ground level in the spring. They grow very tall, 4 to 5 ft. and they flop in late summer. Staking is not attractive. Full sun. I have not able to confirm this on…

Creeping thyme they look dead now

Hi I have creeping thyme. I planted them as ground cover 3 years ago and they have been fine. I do not recall when they usually start turn green after the winter is gone. Right now they look so brown…

Where to Source a Bay Laurel Tree

Good morning , I work in a beautiful floral shop in Lindsay Ontario. We have a customer searching for a Bay Laurel tree . It will be in a greenhouse environment all year Hoping you have an Ontario source idea…

Peony sprout

Hello, I planted some bare root peonies last November in an area that gets good sun. I didn’t mulch and only planted them a few inches deep. I am wondering when I should expect some sprouting? I am worried that…

Overwintered geraniums

I removed all the soil and most of the leaves from my geranium plants, boxed them and left them.  I did nothing to them e.g. water.  I took a look at them recently and they looked deader than a door…

Plant Selection

Hi, I’m looking for ground covers which are: – flowers in summer (like Chrysogonum virginianum) or fall (like Solidago flexicaulis) – white or pale pink / pale blue flower colour – part to full shade – no more than 1′…

Sloping gardens *

Eight years ago, we built garden to avoid mowing steep-sloping, east-facing front yard. Sun is an issue. I planted Kitten’s Eye iris, daylilies, Siberian iris and Brilliant sedum, along with some creeping blue-flowered veronica, variegated hosta and ground phlox at…

powdery 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.…

Poppies *

I have poppy seeds that I have received from a cottager. When should I plant them in the ground, how deep , how many seeds per hole? We are in Wasaga Beach, very cold nights still but summers can be…