Archive for the ‘alkaline soil’ Category

Native Catalpa Trees

Catalpa Tree Northern catalpa or cigartree (Catalpa speciosa) overpowers most private landscapes by their enormous presence (USDA hardiness zones 4-8). This 40-60 feet large native tree commonly grows along roadsides, particularly on bottomlands from Illinois and Missouri south thru Arkansas and Tennessee. Catalpa is not a tree seen planted in most residential neighborhoods because of […]

Why My Tree Turns Yellow in Summer

Leaves of some landscape trees turn yellowish- green color in the summer. The common cause for this malady is a lack of minor nutrients (“micronutrients”) that are essential for plant growth. These nutrients are available in the soil in very small quantities. Nutrient deficiencies are not common, except in the high pH soils, particularly the […]

Mimosa Tree – Love It Or Not

Over the hot spring and summer months, weedy Mimosa trees (Albizia julibrissin) stand beautiful along U.S roadsides. During the rest of the year, people pay very little attention to this arboreal Asian beauty that inhabit a vast area from Iran to China (USDA hardiness zones 6-9). From late spring through summer, mimosa struts an attractive […]

Summer Blooming Golden Raintree

Golden raintree (Koelreuteria paniculata)is a medium sized deciduous tree that grows 30 to 45 feet tall and 25-35 feet wide, a horizontally branched tree Zones 5-9). This tree has a medium to fast growth rate, blooms at an early age with upright twigs with yellow flowers, a rare color among flowering trees whenever the time […]

Whale’s Tongue Agave

Whale’s Tongue Agave Over the past 10-15 years, interest in growing agaves has really caught fire, whale’s tongue agave (Agave ovatifolia) in particular. It grows to 3 to 4 feet tall and 4 to 6 feet wide in 5 to 8 years, especially with summer water. Like many agaves, whale’s tongue blooms after 15-20 years, […]

Lion’s Tail

Lion’s tail (Leonotis leonurus) is a tropical plant native to south Africa (USDA hardiness zones 8-11). I have seen used as a late summer – fall blooming annual in public gardens. Lion’s tail’s bright burnt orange flowers are standouts and receive great notice. The common name “Lion’s Ear” comes from the flowers resembling the color […]

Hawthorn Trees In The Landscape

The world of hawthorns (Crataegus spp.) includes several outstanding landscape trees that exhibit four-season ornamental interest: 1. spring flowering, 2. disease-free summer foliage, 3. variable fall leaf color, and 4. colorful fruits for wildlife in the fall and winter months. World-wide, hawthorns are native to temperate regions of North America, Europe, Asia, and North Africa, […]

‘Goshiki’ Holly Tea Olive

Holly Tea Osmanthus, also called holly tea olive and false-holly (Osmanthus heterophyllus) is a large (15 feet tall), dense, upright, oval-rounded evergreen shrub. The species blooms in late fall and the tiny inconspicuous white flowers are sweetly fragrant. Small numbers of fruits ripen the following year, and often go unnoticed. Osmanthus heterophyllus ‘Goshiki’ is a […]

Clump Type Ornamental Grasses Excel In Autumn

City gardeners want low maintenance. These ornamental grasses are what you’re looking for. They achieve their intended growth heights in summer, and produce flowers (inflorescence). Foliage of some change color as temps start cooling in late summer. Five of six listed grass species are winter hardy and overwinter outside in large containers or tubs in most regions […]

Goldenrods

Goldenrods (Solidago spp.) represent about 100 species of perennials that grow ubiquitously alongside U.S. roadsides, prairies, open woods, and riverbanks. (USDA hardiness zones 4-9). A few species are also native in South America and Eurasia. Goldenrods are grown for their bright yellow or golden flowers that form late in the summer. They are easy to grow, […]