Chinese Hickory
Carya cathayensis
Family: Juglandaceae
What it is like
Carya cathayensis is a deciduous Tree growing to 18 m (59ft 1in) at a slow rate. See above for USDA hardiness. It is hardy to UK zone 6. It is in leaf from June to October, in flower from April to May, and the seeds ripen from September to October. The species is monoecious (individual flowers are either male or female, but both sexes can be found on the same plant) and is pollinated by Wind. The plant is self-fertile. Suitable for: light (sandy), medium (loamy) and heavy (clay) soils. Suitable pH: mildly acid, neutral and basic (mildly alkaline) soils. It cannot grow in the shade. It prefers moist soil.
Height (m): 18
Where it is found
Narrow moist valleys and the foot of mountains. Forests on mountain slopes, valleys, and riverbanks at elevations of 400 - 1500 metres.
E. Asia - E. China.
Conservation Status: This taxon has not yet been assessed
Countries/locations it is found in
How it is used
Food
Rating: 3
Seed - raw or cooked. Rich in oil. it has a sweet flavour and is highly esteemed by the Chinese. The seed ripens in late autumn and, when stored in its shell in a cool place, will keep for at least 6 months. An edible oil from the seed is used in cooking. Carbon Farming - Staple Crop: oil.
Oil: Oil
Seed: includes nuts, cereals, peas and beans.
Medicine
Rating: 0
Other
Rating: 3
Wood - hard, tough, elastic. Used for tool handles etc. A very good fuel, burning well and giving off a lot of heat.
Fuel: Usually wood, plant materials that have been mentioned as being a good fuel.
Oil: Vegetable oils have many uses, as lubricants, lighting, soap and paint making, waterproofing etc. This does not include the edible oils unless they are also mentioned as having other uses.
Wood: A list of the trees and shrubs that are noted for having useful wood.
Management: Standard: Plants grow to their standard height. Harvest fruit, seeds, or other products. Non-Destructive management systems.
Regional Crop: These crops have been domesticated and cultivated regionally but have not been adopted elsewhere and are typically not traded globally, Examples in this broad category include perennial cottons and many nuts and staple fruits.
Staple Crop: Oil: (0-15 percent protein, 16+ percent oil). Some of these are consumed whole while others are exclusively pressed for oil. Annuals include canola, poppyseed, maize, cottonseed, sunflower, peanut. Perennials include high-oil fruits, seeds, and nuts, such as olive, coconut, avocado, oil palm, shea, pecan, and macadamia. Some perennial oil crops are consumed whole as fruits and nuts, while others are exclusively pressed for oil (and some are used fresh and for oil).
Management: Standard: Plants grow to their standard height. Harvest fruit, seeds, or other products. Non-Destructive management systems.
Regional Crop: These crops have been domesticated and cultivated regionally but have not been adopted elsewhere and are typically not traded globally, Examples in this broad category include perennial cottons and many nuts and staple fruits.
Staple Crop: Oil: (0-15 percent protein, 16+ percent oil). Some of these are consumed whole while others are exclusively pressed for oil. Annuals include canola, poppyseed, maize, cottonseed, sunflower, peanut. Perennials include high-oil fruits, seeds, and nuts, such as olive, coconut, avocado, oil palm, shea, pecan, and macadamia. Some perennial oil crops are consumed whole as fruits and nuts, while others are exclusively pressed for oil (and some are used fresh and for oil).
Carbon Farming: Plants that can be a critical part of the solution to climate problems. The Carbon Farming Solution - Eric Toensmeier.
Food Forest: Plants for Edible Forest Gardens and Food Forests.
How it is grown
Prefers a deep moisture-retentive loam in a sunny sheltered position, requiring a good summer for best development. Slow growing. Dislikes wind exposure. Plants are intolerant of much frost. Another report says that plants succeeds in climatic zone 6, which suggests that they should tolerate temperatures down to about -15 and -20°c. Cultivated for fod in China, the edible seed is often sold in local markets in China. Plants are strongly tap-rooted and should be planted in their permanent positions as soon as possible. Sowing in situ would be the best method so long as the seed could be protected from mice. Trees are late coming into leaf (usually late May to June) and lose their leaves early in the autumn (usually in October). During this time they cast a heavy shade. These factors combine to make the trees eminently suitable for a mixed woodland planting with shrubs and other trees beneath them. Plants in this genus are notably resistant to honey fungus. Most species in this genus have quite a wide range of distribution and, in order to find trees more suited to this country, seed from the most appropriate provenances should be sought. Most trees growing in Britain at present tend to only produce good seed after hot summers. Trees are self-fertile but larger crops of better quality seeds are produced if cross-pollination takes place. Carbon Farming - Cultivation: regional crop only. Management: standard.
Propagating it: Seed - requires a period of cold stratification. It is best sown in a cold frame as soon as it is ripe. Stored seed should be kept moist (but not wet) prior to sowing and should be sown in a cold frame as soon as possible. Where possible, sow 1 or 2 seeds only in each deep pot and thin to the best seedling. If you need to transplant the seedlings, then do this as soon as they are large enough to handle, once more using deep pots to accommodate the tap root. Put the plants into their permanent positions as soon as possible, preferably in their first summer, and give them some protection from the cold for at least the first winter. Seed can also be sown in situ so long as protection is given from mice etc and the seed is given some protection from cold (a plastic bottle with the top and bottom removed and a wire mesh top fitted to keep the mice out is ideal)
Best place to grow: Woodland Garden Canopy;
Habit: Tree
Hardiness: 5-9
Growth: Slow
Soil: Light (sandy), medium, heavy (clay)
Shade: No shade
Moisture: Moist