Richard Hawke
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Design
A Guide to Growing Reed Grasses: Best-Performing Varieties and Care
As native grasses such as little bluestem (Schizachyrium scoparium and cvs., Zones 3–9) and prairie dropseed (Sporobolus heterolepis and cvs., Zones 3–9) increasingly gain traction in gardens, exotics such as…
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Design
Sterile Varieties of Butterfly Bush
I have mixed feelings about growing and promoting butterfly bushes. On the one hand, they are beautiful and reliable garden plants; on the other hand, their weedy nature cannot be…
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Design
Best of the Sweetshrubs: Plant Trial Results
Woody plants take up a lot of space for a lot of years, so here at the Chicago Botanic Garden we must be choosy about which shrubs we try. A…
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How-To
Best of the Bush Clovers: Trial Plant Results
By the time August rolls around, I’m looking for something new in the garden to pique my interest. I’m not quite ready for fall plants to take their turn, so…
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How-To
Tips to Improve Bush Clover Performance
Best location With bush clovers, full sun is best for heavy flower production and to maintain full-bodied habits. These plants are easy to grow in average to dry soil; good…
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How-To
Growing Summer Alliums: Conditions and Care
When given proper conditions and care, summer alliums are stellar, reliable performers in the landscape. Here are some insights into growing summer alliums that can help you manage and enjoy…
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Design
The Best Summer Alliums to Grow: Plant Trial Results
Some years ago, during a midsummer trip to Wisconsin, I found myself transfixed by a vast planting of ‘Summer Beauty’ allium dotted throughout with taller bright pink coneflowers (Echinacea spp.…
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Design
Noteworthy New Summer Alliums
Although too new to our trial to be fully evaluated, these notable alliums are worthy of praise. Keep an eye out for them when you're at your local garden center…
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How-To
How to Grow and Care for Ninebark Shrubs
A low-maintenance native shrub, ninebark grows best in full sun to light shade. Although it prefers evenly moist, well-drained soil, it is adaptable to rocky and clay soils and is…
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How-To
The Best Ninebark Shrubs for the Garden
Common ninebark (Physocarpus opulifolius) is one of those shrubs that I learned about in college and then forgot about until sometime around the Millennium, when purple-leaved Diabolo® transformed a humble…