Grows very well in Southern Quebec (zone 5a) though not as large as in rainier climate. Makes a compact cushion with lots of flowers fro...Read Morem mid-June to August. A favorite.
This is a fabulous plant for very cool, wet gardens in cold climates. It did beautifully in Southeast Alaska (temperate rainforest climat...Read Moree--about Zone 4) from a few struggling seedlings we ordered. Although it does tend to be "scraggly" in warmer, less moist climes (such as Monterey, CA) it creates a neat, large, rounded mound with summer-long flowers in a rainy environment. Blooms stay open in the worst of weather and it has no nasty tendencies toward mildew. It is also unattractive to the "usual suspects" -- aphids, slugs, etc.
Other pluses include its lack of resentment to having hunks taken off to share in the spring--although it may wilt in the area where the roots were cut for a few days. It also reseeds prolifically and true to type.
It can, however, get very large. My plants went from weak seedlings with five delicate stalks to 3-foot-diameter plants within two years. Those with limited space may want to contain these beauties in some way.
According to the Royal Horticultural Society, this is a hybrid, G. x oxonianum, and not a cultivar of G. endressii.
(this has been corrected)
Grows very well in Southern Quebec (zone 5a) though not as large as in rainier climate. Makes a compact cushion with lots of flowers fro...Read More
This is a fabulous plant for very cool, wet gardens in cold climates. It did beautifully in Southeast Alaska (temperate rainforest climat...Read More
Blooms wonderfully. Not a front of the border plant, it sprawls a bit. Has bloomed for over one month.