Growth Facts

Zwanenburg Blue Spiderwort
Tradescantia x andersoniana 'Zwanenburg Blue'
Pretty cobalt-blue blossoms greet the early days of summer.
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Don’t let the creepy name fool you—Spiderwort is an endearing plant! Even novice gardeners will find it satisfying and simple to grow. Like your favorite pair of blue jeans, it’s easy, comfortable, and goes with just about everything! Zwanenburg Blue Spiderwort makes an arching mound of strappy foliage that’s peppered with jewel-toned flowers in early summer. The purple-blue blossoms often rebloom if the plant is cut back after the first wave of flowers passes. Grow it mid-border in your entryway garden, patio plantings, or anywhere you need something that’s colorful and dependable.

Growth Facts

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The Story

Nobody is exactly sure how Spiderwort got its unfortunate name, but don’t worry—even if you’re afraid of spiders, there’s no cause for alarm. It may have gotten its name from its sap, which forms threads like a spider’s web when stems are cut and pulled apart. This selection belongs to a hybrid category of Spiderworts made up of a few different species that are all native to the eastern U.S. Zwanenburg Blue is a classic Spiderwort selection that has been around for quite some time. It was presumably discovered in the town of Zwanenburg, which is in the Netherlands.

The Details

Spiderwort blooms are at their best in the morning, so plant Zwanenburg Blue where you will see it then. The flowers tend to close by late afternoon if it is sunny out

How to Grow

Zwanenburg Blue Spiderwort will be happiest in a mostly sunny site, with shade only during the hottest part of the day. The soil should be moist, organic, well drained, and somewhat rich. Basically, it prefers good conditions, but overly fertile soil will result in floppy growth, so don’t overdo it. Staking may be required if growth does become lax; you can always cut plants back and let them resprout if you’d rather not stake them. Cut old growth back before new shoots emerge in early spring. If you grow more than one variety of Spiderwort, seedlings may appear. Shear plants right after blooming has finished if you don’t want seedlings.

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