Ask a Question forum: Perennial foxglove

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Name: Lee-Roy
Bilzen, Belgium (Zone 8a)
Irises Lilies Hostas Ferns Composter Region: Belgium
Jun 10, 2017 4:54 PM CST
Hello everyone. I'm wondering if there's a 'true' perennial foxglove (Digitalis)...? One that flowers for more than one season or doesn't bite the dust after 2/3 years. I've found confusing info online regarding D. grandiflore or D. lutea. Some say these are true perennials, others say they're biannuals just like D. purpurea...Anyone with experience?

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Name: Debbie
Manitoba, Canada (Zone 3a)
Hostas Cat Lover Annuals Bulbs Container Gardener Critters Allowed
Enjoys or suffers hot summers Houseplants Foliage Fan Butterflies Bee Lover Native Plants and Wildflowers
Jun 10, 2017 5:26 PM CST
I've grown d. grandiflora in my zone 3 garden for at least 5 years. Can't grow d. purpurea here for love or money, lol. Definately grandiflora is perennial.
Name: June
Rosemont, Ont. (Zone 4a)
Lover of wildlife (Raccoon badge) Beavers Region: Canadian Dragonflies Butterflies Cactus and Succulents
Birds Cat Lover Native Plants and Wildflowers Deer Garden Ideas: Level 1
Jun 11, 2017 7:31 AM CST
Hi Lee-Roy @Arico

Digitalis ambigua, D. dubia, D. ferruginea, D. grandiflora, D. x 'John Innes', D. lanata, and D. parviflora plants behave like perennials in my garden. I have noticed some plants will form offsets that take over after the part that flowered has set seed and died. I grow all of them in full sun and gravelly soil. They have hybridized and self-seeded freely (perhaps a little too freely!) in my flowerbeds over the years.

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