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Cotinus coggygria
Cultivation Notes
This article was provided care of 'Plants For A Future'
| Latin Name: | Cotinus coggygria |
| Common Name: | Smoke tree |
| Family: | Anacardiaceae |
| Synonyms: | Rhus coggygria. R. cotinus. |
| Known Hazards: | Skin contact with this plant can cause dermatitis in sensitive people[200]. Though related to several poisonous species, this species is definitely not poisonous[65]. |
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Author: Scop.
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| Habit: A Medium Growing Deciduous Shrub |
| Habitat: Dry hillsides, rocky places and open woods, usually on limestone, to 1300m[45, 50, 89]. |
| Height: 5.0 Width: 5.0 |
Cultivation Details:
Tolerates most soils[202]. Prefers a well-drained dry or moist soil in a sunny position[108, 200], doing better in a soil that is not very rich[11, 49]. Prefers a fertile but not over-rich soil[188]. Tolerates light shade[188]. Established plants are drought tolerant.
Plants are hardy to about -20°c[184], though die-back often occurs at the tips of shoots during the winter[202].
Plants are slow to establish but are then quite fast growing when young though they slow down with age[202].
Hybridizes with C. obovatus[182].
A number of cultivars have been developed for their ornamental value[182, 200]. The purple-leaved cultivars are susceptible to mildew[202].
Plants flower on wood that is at least 3 years old[202]. Any pruning is best done in the spring[202]. Branches sometimes wilt, especially after hard pruning, and these should be removed[182].
This species is notably resistant to honey fungus[88, 200].
Dioecious. Male and female plants must be grown if seed is required.
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Propagation Notes:
Seed - best sown as soon as ripe in a cold frame[78, 113, 200]. It should germinate in the spring. Slightly immature or 'green' seed, harvested when it has fully developed but before it dries on the plant, gives the best results[113]. Warm stratify stored seed for 2 - 3 months at 15°c, then cold stratify for 2 - 3 months[164]. Germination can be very slow, taking 12 months or more at 15°c[164]. The seed has a long viability and should store for several years[113].
Cuttings of half-ripe wood, July/August in a frame[113].
Trench layering in spring[200].
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