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Hardiness: USDA Zone 3b: to -37.2 °C (-35 °F) USDA Zone 4a: to -34.4 °C (-30 °F) USDA Zone 4b: to -31.6 °C (-25 °F) USDA Zone 5a: to -28.8 °C (-20 °F) USDA Zone 5b: to -26.1 °C (-15 °F) USDA Zone 6a: to -23.3 °C (-10 °F) USDA Zone 6b: to -20.5 °C (-5 °F) USDA Zone 7a: to -17.7 °C (0 °F) USDA Zone 7b: to -14.9 °C (5 °F) USDA Zone 8a: to -12.2 °C (10 °F) USDA Zone 8b: to -9.4 °C (15 °F) USDA Zone 9a: to -6.6 °C (20 °F) USDA Zone 9b: to -3.8 °C (25 °F)
Sun Exposure: Full Sun
Danger: N/A
Bloom Color: White/Near White
Bloom Time: Mid Summer Late Summer/Early Fall Mid Fall
Foliage: Herbaceous
Other details: Average Water Needs; Water regularly; do not overwater
Soil pH requirements: 6.1 to 6.5 (mildly acidic) 6.6 to 7.5 (neutral) 7.6 to 7.8 (mildly alkaline)
Propagation Methods: By dividing the rootball From seed; direct sow outdoors in fall From seed; winter sow in vented containers, coldframe or unheated greenhouse From seed; stratify if sowing indoors
Seed Collecting: Allow seedheads to dry on plants; remove and collect seeds Wear gloves to protect hands when handling seeds N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed
On Jul 20, 2008, trioadastra from Ellsworth, WI (Zone 4a) wrote:
This is my favorite coneflower. It is simple and elegant, sturdy and stately. I have about 5 plants, all started from seed, which was very easy to do. I also moved one this spring, dug 6 inches from the crown all the way around, and relocated the whole clump. Much to my surprise, it is growing back in the same spot from some roots left in the ground! Now that's what I'd call tough. (Think I'll let it stay in that spot...) I will add, though, that mine do not self sow.
I love this coneflower. I just planted three of them together last year. Since they were just settling in they didn't put on much of a show. I was having mixed feelings about this cultivar. That has changed. This year they are gorgeous. Tons of bloom even without constant deadheading. The white petal color with an olive-yellow-brown cone compliments the pure green foliage beautifully. I would recommend this cultivar of coneflowers. I find it very easy to care for, it has lots of blooms, and it hasn't shown any signs of disease.
On Aug 23, 2006, RDT from Crossville, TN (Zone 6b) wrote:
I have a horticulturist friend who agrees with me that this has never reseeded itself in our area. It does grow larger and can be separated by dividing the roots. Great plant.
On Feb 28, 2005, saya from Heerlen
(Netherlands) (Zone 8b) wrote:
This purpurea has disappointed me a little. The flowers are somewhat small and touched by a bug, fungus ....?
I 've seen pics of these however on this thread that showed a bit of what I'm complaining about.
I've given it another spot in my garden now, maybe it 'll do better.
On Oct 22, 2004, CBernard from Perris, CA (Zone 9a) wrote:
Has anyone in So California had success with this plant? I just planted one from out of state and I am eager to see if it does well!! 7/23/2005 Actually the White Swan Coneflower is blooming beautifully. I didn't really expect it to bloom this summer because I just planted them last fall but they did. They are also nice to look at. Chuck
6/4/2006 I have bought a total of four of these plants. I have planted them in different places in my backyard. However I can't get any of the plants to last longer than one year. They are very good at attracting butterflies but they are annuals in my backyard.
On Aug 1, 2004, ncgardenaddict from Kannapolis, NC (Zone 7b) wrote:
Upright, drought tolerant, and beautiful! Southern heat and humidity does not bother it a bit and the blooms last a long time on the plant or in a vase. This may be one of my favorite coneflowers.
On Jun 2, 2004, nipajo from Dallas, TX (Zone 8b) wrote:
Like the purple coneflower, the white coneflower spreads rapidly. This year for some reason they have taken off. The blooms last a good long time and keep reblooming until frost. I live in the 7-8 zones, in Dallas Tx.. We must have had a mild winter because they are slowly moving out from the back to the front.
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