Crataegus grignonensis
Grignonensis
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Grignonensis (Crataegus grignonensis) - Description
Crataegus × grignonensis is a hybrid hawthorn commonly known as "Grignon Hawthorn". The hybrid originated as a seedling of Crataegus mexicana. It is an excellent small ornamental tree up to about 5 meters in height, with deep red fruit that contain 1 or 2 pyrenes.
Grignonensis (Crataegus grignonensis) - Blooming
Hawthorns' clustering white flowers bloom during springtime, and then go on to yield tiny, apple-shaped fruits in summer and fall.
Grignonensis (Crataegus grignonensis) - Growth
Thorny, deciduous trees and shrubs. Hawthorns do well in full sun. Some species will grow to be approx. 30 ft. in height. Hawthorns attract wildlife. They are best grown as hedges and specimen trees that can withstand urban, coastal, and exposed conditions.
Grignonensis (Crataegus grignonensis) - Planting
When ripe, remove the seeds from the fleshy exterior. Sow in a seedbed or in containers in an open frame. Germination is slow and can take up to 18 months.
Grignonensis (Crataegus grignonensis) - Pest
Fire blight (a plant disease characterized in appearance by blackened tissue), aphids, and scales insects.
Grignonensis (Crataegus grignonensis) - Interesting facts
Hawthorns are somewhat unique in that attentiveness and otherwise good conditions (good soil, regular water and fertilization) can negatively affect the tree as a whole. These conditions foster young growth that is highly susceptible to fireblight, and can result in massive die-off of entire branches. They attract bees and birds.
Grignonensis (Crataegus grignonensis) - Soil and irrigation
Hawthorns should be kept somewhat dry. They do well in any soil that that has good drainage.
