Cardinal flower (Lobelia cardinalis) is a hardy perennial native in USDA zones 5-8. Clumps should be divided every 2-3 years to retain plant vigor. Soil moisture determines its height and vigor. Cardinal flower prefers half-day direct morning sunlight, particularly in more southern climes. The brilliant red flowers bloom from late July through most of September, […]
Archive for the ‘Flowers’ Category
Plumleaf Azalea Is Showy Summer Blooming Shrub
Plumleaf azalea (Rhododendron prunifolium) has been blooming in my garden for the past ten days. This species is a late July – early August bloomer in northeast TN. The bright orange-red flowers of this native azalea light up any garden spot whether in full sun or partial shade. Provide some additional shade in southern climes […]
‘Buttered Popcorn’ Daylily- Performs In The Mid-South
Daylily ‘Buttered Popcorn’ (Hemerocallis ‘Buttered Popcorn’) produces buttery yellow 6″ flowers from late June thru mid-July. The 32-inch tall floral scapes are well branched and flowers are mildly fragrant. Bud count on each scape may average 10 or more. This tetraploid cultivar is also well known for its incredible fall re-bloom. In the Southern Appalachian […]
Coreopsis ‘Route 66’ – A Riot of Color
Create a hot splash in your garden this summer. Threadleaf coreopsis (Coreopsis verticillata) ‘Route 66’ is a new selection by Itsaul Nursery in Atlanta, Georgia (USDA zone 4 to 9). Coreopsis ‘Route 66’ originated in Pennsylvania (zone 5). Perennial gardeners have been planting yellow- flowered ‘Moonbeam’ and ‘Zagreb’ cultivars for over a quarter of a […]
Culver’s Root (Veronicastrum)
Midwest native Culver’s root (Veronicastrum virginicum) starts the summer flowering season in my perennial garden. It naturally grows in open woods and meadows and thrives in fertile to moist soils. However, this deep rooted plant hasn’t complain about the current dry period in the Southern Appalachian region (USDA zones 6-7). Be aware that culver’s root […]
New Hardier Gardenias
Old fashioned gardenias or cape jasmines (Gardenia jasminoides) are reliably hardy in USDA zones 7-b and 8. Plants require immediate protection when the outdoor temperatures dip below 15 to 20 degrees. The new hardier cultivars are compact growers, 2-4 feet tall and 3-4 feet wide. ‘Frost Proof’, Crown Jewel™, and Heaven Scent™ are three promising […]
Vitex ‘Shoal Creek’
Chastetree (Vitex agnus-castus) is an 8-10 foot deciduous shrub or 12-15 foot tall small tree (hardiness zone 6-b thru 8). Branching habit is dense and vase-shaped (upright). It blooms over most of the summer, from June thru late August. Its 12-18 inch long blue-violet flower spikes exude a slight herbal fragrance. ‘Shoal Creek’ is a […]
Catalpa Both Loved And Hated
Northern catalpa or Indian cigar tree (Catalpa speciosa) has enormous presence in any landscape setting (USDA hardiness zones 4-8). Finding a 70 – 80 foot tree with a massive trunk and thick sinuous limbs is not unusual from Ohio south thru Tennessee. In summer its huge heart –shaped, pale green leaves may be easily reach […]
Dreaded Rose Rosette Disease
No rose is resistant to this deadly virus disease. Symptoms of rose rosette disease (photo) vary greatly from the species or cultivar planted. Leaves may be small, distorted, and exhibit a conspicuous red pigmentation. Diseased canes may also be noticeably thicker than others around them, and/or may grow in a spiral pattern. Multi-flora roses, a […]
No-Spray Shrub Roses
Photo: Carefree Sunshine Rose at UT Gardens in Knoxville, TNOver the past decade the Knockout®, Carefree® and Home Run® series of shrub roses have altered the appearance of residential and commercial properties. From 2006 -08, no-spray rose trial was conducted at two University of Tennessee Research and Education Centers in Jackson and Crossville, TN and […]

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