Keywords: Woody plant propagation, Ginkgo biloba, Propagation
PAL Question:
Onto what root stock should I graft a Ginkgo biloba scion?
View Answer:
According to The Complete Book of Plant Propagation (Taunton Press, 1997, Jim Arbury et al.), Ginkgo biloba can be propagated without grafting, by taking semi-ripe cuttings in midsummer and dusting them with rooting hormone and potting them up in a mixture of half peat, half sand/vermiculite. Cuttings should root by spring if kept moist, and need to be planted out once they have roots.
If you wish to graft it, you need a Ginkgo biloba rootstock, which you could
grow from seed if you have access to a female ginkgo tree (they are hard to
find), and (according to the American Horticultural Society Plant
Propagation manual) you can use a whip-and-tongue or spliced side veneer
graft done in late winter. The AHS manual also recommends taking softwood cuttings
in late spring or early summer for ginkgo.
There is also helpful information from The Ginkgo Pages and Plants for a Future Database, which says that softwood cuttings are taken in spring, semi-ripe cuttings are taken in July and August, and hardwood cuttings are taken in December, and all are kept in a frame.
Season
All Season
Date 2008-08-27
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Keywords: Ginkgo biloba, Propagation
PAL Question:
How can I grow a ginkgo tree from seed?
View Answer:
According to the American Horticultural Society's Plant Propagation (DK Publishing, 1999), seeds may be sown in late winter. Gather the ripe fruit of the female tree in mid-autumn, and clean off the pulp. Then wash the seeds with mild soap to remove germination inhibitors, and store the seeds in the refrigerator for 30 to 60 days before sowing outdoors in containers. Here is more information from Plants for a Future:
"Seed: best sown as soon as it is ripe in a cold frame or in a sheltered outdoor bed. The seed requires stratification according to one report whilst another says that stratification is not required and that the seed can be sown in spring but that it must not have been allowed to dry out. Germination is usually good to fair. Prick out the seedlings into individual pots when they are large enough to handle and grow them on in light shade in the greenhouse for their first year. Plant them out into their permanent positions in the following spring and consider giving them some protection from winter cold for their first winter outdoors."
The Ginkgo Pages website also has useful propagation information.
Season
All Season
Date 2009-05-28
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Keywords: Verticillium, Quercus alba, Pseudotsuga menziesii, Malus sylvestris, Malus domestica, Liquidambar, Katsura, Ginkgo biloba, Fraxinus, Biofumigation
Garden Tool:
Don't despair if verticillium wilt lives in your garden's soil because there are many resistant plants. A few verticillium-resistant trees include Apple and Crabapple, Mountain Ash, Ginkgo, Sweet Gum, Katsura, Douglas Fir, Arborvitae and White Oak. A long list of susceptible and resistant trees, shrubs, perennials and vegetables.
There is some evidence that broccoli (chopped up new shoots worked into the soil) can act as a soil fumigant, if added to the soil before planting. Studies were done by Krishna Subbarao at University of California, Davis, and showed reduced incidence of wilt in cauliflower crops where broccoli had been planted and its residue added to the soil.
Season: All Season
Date: 2007-05-23
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