These apples and pears were grown in North America during the Colonial Era and through the time of the American...
G.30 Apple Rootstock (Spring 2022)
A semi-dwarf rootstock, more productive and better anchored than M.7. Also known as Geneva 30.
G.30 is a semi-dwarf rootstock that produces trees about 50% of standard. As with all the Geneva rootstock, G.30 is resistant to fireblight and collar rot. Recent testing also showed tolerance to replant disease. Its cold hardiness has been well demonstrated: In a test planting in Quebec, McIntosh trees on G.30 survived, while those on M.M106 were killed by a harsh winter. G.30 will produce a few burr knots. The difficulty with G.30 is that its liners are very tricky to benchgraft. The wood is hard and knobby, and in the budding nursery it is sometimes difficult to find an open area to slip in a bud. Those "knobs" are latent buds, swollen with hard fibers, and in the stoolbed many spines develop. In some test plantings of Gala–a brittle variety that was subjected to unusually high winds–there was severe union breakage. We recommend that all varieties receive support, at least for the first five or six years.
G.30 is very resistant to fireblight, tolerant of replant disease and phytophthora, and susceptible to WAA.
G.30 came out of the Geneva, NY breeding program and the work of my father, Dr. Jim Cummins.
|Quantity||G.30 Apple Rootstock|
Tree Height & Spacing
Rootstock size class: Half-Standard (50% of Standard)
Tree spacing (natural spread of tree): 18'
Good for wildlife planting?
Burr Knots: N
Ease of Grafting: N
Diseases & Pests
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