Plants of the Week: July 27

Vitex agnus-castus Shoal Creek JTVitex agnus-castus ‘Shoal Creek’ (Chastetree)

Lamiaceae

As you approach the corner of Mertz Residence Hall, it will be hard to miss the mass of blue-grey foliage and massive blue flower spikes of Vitex agnus-castus ‘Shoal Creek’. I really enjoy this tree because of its multi-season interest and its ability to tolerate hot and dry conditions. Although winter die-back is common in Zone 5 and 6, the specimen on campus seems extremely vigorous. This plant can be limbed up as a multi-leader small tree or left alone as mounding shrub. Vitex is a wonderful option for full sun and lean soils. …

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Plants of the Week: July 20

Campsis grandiflora 'Morning Calm'(3)LKL

Campsis grandiflora ‘Morning Calm’

 Check out the vibrant flowers of the Isabelle Cosby Courtyard Campsis! The Campsis grandiflora ‘Morning Calm’ is great for attracting hummingbirds. This Chinese trumpet vine makes a fantastic cover for fences; however, beware: it is a vigorous self-climber and can grow up to 30 feet high! This easy maintenance plant can be propagated with soft wood cuttings. No wonder it’s a winner of the Pennsylvania Horticultural Society’s Gold Medal Plant Award for its exceptional qualities in the Mid-Atlantic. Full sun is best for this beautiful summer bloomer. This plant is available at the 2015 Scott …

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Gardening Best Friends: Allium and Roses

June 3 2015 RHR 114Is your garden plagued by aphids, slugs, cabbage worms, or other pests? If so, Allium may be the solution you have been waiting for. The ornamental onion genus, Allium¸ which includes chives, garlic, leeks, and shallots is regarded as a broad spectrum natural insect repellent. Thus Allium is planted as a beautiful, dramatic bedfellow of roses throughout the newly renovated sustainable Dean Bond Rose Garden.

The low profile of Allium christophii combines well with roses in the Dean Bond Rose Garden. photo credit: R. Robert

The low profile of Allium christophii combines well with roses in the Dean Bond Rose Garden. photo credit: R. Robert

Many unwelcomed pests are attracted by odors emitted from plants. Members of the allium family, …

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