var. inermis 'Shademaster'
Shademaster Thornless Honey Locust
A common tree that because of its tolerance to urban conditions is in my opinion often over-planted. Poor autumn colour, little winter interest, it's only attribute is providing dappled shade.
|USDA Hardiness Zone
|3 - 7
|Canadian Hardiness Zone
|-20C to -33C
|-3F to -27F
|Has a wide thin spread crown, zig-zag shoot growth pattern, slightly gnarly branching structure.
|It grows strongly in well drained soils with a high pH, but it is also a very adaptable tree and will grow in less than perfect conditions. It requires full sun.
|Vase shape, later at maturity it will develop a more oval shape.
|Small distinctive pinnate and bi-pinnate oval leaves, thin crown density, it has a long winter dormancy period, the cultivar ‘Shademaster’ has darker green leaves, than the species.
|Susceptible to mimosa webworm, powdery mildew, aphid infestations and spider-mites which will cause yellowing of the leaves. Reddish galls at the branch tips can be problematic.
|The species is native to the floodplains of eastern and southern United States.
|The bark is smooth grey-olive in colour and heavily lentisiled when it is young, It has a grey plate like bark with deep fissures in its mature stages.
|Flower/Leaf Bud Description
|Small brownish lateral buds 1.5cm long, some are scaly and some are naked.
|Small rounded base with an entire margin, no longer than 5cm, foliage often occurs in both pinnate and bi-pinnate forms on the same tree.
|Flower has a pleasant fragrance, not very aesthetically pleasing, flower is yellow-green in colour and formed in clustered, 4-5cm long racemes.
|Very rarely produces fruit, if at all. If it does produce, the fruit is a long; dark brown pod 20-45cm in length. They are 2-3cm wide and usually from a twisted shape.
|Dark green foliage which turns to yellow in early autumn, gray-olive bark colour and a yellow-green flower.
|Leaves have a smooth finish, the bark is smooth on new shoot growth but quickly becomes deeply fissured and rough to the touch.
|Victoria Park, London, Ontario.
|Scarify seeds and sow directly outdoors in autumn, bud grafting is often used for clonally propagated plants.