Empress tree (Paulownia tomentosa) is a fast-growing shade tree, in some years adding 4-5 feet of new growth, eventually to reach heights of 40-50 feet and width of 20-30 feet in less than 20 years. In the first 3-4 years, juvenile trees develop enormous size leaves. Once trees start producing flowers (adult stage), leaves are […]
Archive for the ‘Invasive species’ Category
Getting Rid Of Difficult Weeds
Some aggressive perennials like Chameleon plant (Houttuynia cordata), variegated Bishop’s weed (Aegopodium podagraria), along with many woody briars can be extremely difficult to eliminate from a landscape area or garden bed. If a weedy garden bed contains no desirable plants, you can over spray weeds with glyphosate, a nonselective herbicide.(Roundup™ is common trade name). This […]
Plant Disease Warning: Phytophthora ramorum
Known as “sudden oak death”, this serious plant disease (Phytophthora ramorum) (Pr) from the West Coast kills oak and other species of trees. It has caused devastating effects on the oak populations in California, Oregon, and Washington, and is also present in Europe. Symptoms include bleeding cankers on the tree’s trunk and dieback of foliage. […]
Know About Liriopes
Monkeygrass (Liriope muscari) and creeping lilyturf (L. spicata) are native to Asia. They are known by several names including lilyturf, monkeygrass, spider grass and liriope (USDA hardiness zones 6-10). Some varieties are hardier than others. In general, L. muscari have more narrow leaves. Depending on variety, spikes of lavender, purple, or white flowers arise in […]
Pest Alert – Giant Hogweed
Giant hogweed plant (Heracleum mantegazzianum) is a large, invasive plant that can cause severe burns, blisters and rashes and vision loss in humans. As its name suggests, giant hogweed plant is enormous growing invasive species that originated from the Caucasus region of Eurasia. It produces large, towering purple stalks of white flower clusters. Don’t pick these […]
Bugleweed (Ajuga) Groundcover
Bugleweed, aka carpetweed (Ajuga reptans), is low-growing semi-evergreen groundcover that offers almost year-round appeal (USDA hardiness zones 3-9). It develops a low prostrate habit and spreads by runners that root into the soil. Attractive vertical spikes of flowers arise in mid- to late- spring. Cultivars abound with multi-colored flowers. Foliage variants range from light green, […]
Amur Cork Tree
Amur corktree (Phellodendron amurense) is native to Northern China, Korea and Japan (USDA hardiness zones 4-9). Amur corktree is a fast growing, upright branched tree that makes an excellent yard or shade tree. Corktree grows in a wide range soils, and tolerates soil pH between 5.0 to 8.2. It does best in moist, well-drained soils, […]