… that naturalize in Chicago-area gardens, it prefers a shady moist position but its ability to enter summer dormancy makes it remarkably tolerant of heat and drought. It is free of most insect and disease pests. Primula sieboldii is native to swampy meadowlands in Japan, eastern Siberia, Korea, and Manchuria, where it experiences …
Type: Garden Guide Plant
… This cultivated selection of Douglas-fir is a slow-growing miniature globe of short blue-green needles, suitable for a rock garden or border. It becomes more irregular and open with age, but grows to a maximum height of four feet. In its native habitat Douglas-fir, a native evergreen tree, has … – they hang downward and each cone scale has a three-pointed bract. Douglas fir is native to the Rocky Mountains and along the Pacific Coast; in the Pacific coastal regions, it can attain …
Type: Garden Guide Plant
… REGAL PRINCE® oak is a relatively recent introduction that is a cross between the English oak ( Q. robur ) and the … The genus Quercus includes more than 600 species of the oak tree, of which 90 are native to North America; the Chicago Botanic Garden's collection contains more than 60 varieties and over 1,000 individual trees. Twenty oak species are native to Illinois. Oaks are slow growing, long lived, hard wood trees that produce fruit we all know as …
Type: Garden Guide Plant
… Narcissus ‘Spellbinder’ is in Division 1. It blooms in early to mid spring with 4 inch wide flowers. The petals are broad … yellow with a small point at the tip. The cylindrical corona opens a paler yellow but matures to white with a line of yellow at the rim. Released in 1944, the garden worthiness of this …
Type: Garden Guide Plant
… explodes into flower. Plant this salvia in full sun and in average soil, and water it to get the root system established. This perennial is a hummingbird and butterfly magnet. 'Pascal' was discovered in 1988 at a 9,000-foot elevation … in the Mexican Sierra Madre Oriental mountains by Yucca Do Nursery staff. It has proven to be winter hardy in Denver, Colorado, during the last five years. Horticulturist Heather …
Type: Garden Guide Plant
… The American linden is native to Illinois, found growing in woodlands in association with sugar maples. This tree, … flowers favored by bees for making a fine honey, grows rapidly with wide-spreading branches up to 90' tall, too big for most yards. It is not readily available in the trade, and many gardeners …
Type: Garden Guide Plant
… NEWPORT ® Japanese snowball viburnum is a dwarf cultivar that maintains its neat, compact round habit with little pruning. It blooms … color. The flowers are sterile so this shrub does not bear fruit. It will grow in full sun to partial shade and is not fussy about soil types or conditions. Viburnums are a versatile genus of multi-stemmed shrubs that are well suited to the home landscape due to their range of sizes and cultural adaptability. Some viburnums are …
Type: Garden Guide Plant
… This relatively rare native known as Appalachian or American bugbane is found in wooded areas from the Virginias west to Tennessee. If it's really happy, the white spires of bloom can reach 6-feet, though 3 - 5 feet … of tightly packed flowers, often followed by conspicuous berries. NOTE: Berries are poisonous to people and rabbits; harmless to birds and butterflies. …
Type: Garden Guide Plant
… Ageratum houstonianum ('Blue Horizon') produces 3- to 4-inch cushions of tiny blue flowers on 30-inch-tall plants. Free from insects, diseases, and pests, this cultivar is perfect for the annual border or as a cut flower. Plant 'Blue Horizon' in full sun and … hormone activity (precocious metamorphosis in insects). It also produces an oil that is toxic to the fungal plant path on Fusarium wilt. While scientists apparently have not studied the …
Type: Garden Guide Plant
… Check daily for black spot, especially in wet weather. Do not handle rosebushes if foliage is wet and infected. Wait until leaves have dried before removing them and spraying. Monitor … (tissuelike patches on the leaves). Succulent new green growth is particularly susceptible to aphid attack. Monitor newly planted shrubs, small flowering trees, and juicy perennials for … of aphids — curled, distorted tip growth. Spray a strong stream of water on damaged foliage to remove pests. …
Type: Plant Info
