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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.

Volume Pricing

Premiums are included in the following prices if applicable. All rootstocks are roughly 1/4" diameter, approximately pencil-size.

Quantity G.30 Apple Rootstock
1-24 $3.95
25-99 $3.45
100-299 $2.95
300+ $2.65

Order Your Rootstocks

$3.95 ea.

This is the full retail price for orders of 1-24 rootstocks. You can get these rootstocks for as low as $2.65 each – see Volume Pricing above. More about Pricing & Grading.

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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.



Rootstock Details

Category: apple

Tree Height & Spacing

Rootstock size class: Half-Standard (50% of Standard)
Tree spacing (natural spread of tree): 18'
Good for wildlife planting?

Properties

Precocious: Y
Anchorage: excellent
Burr Knots: N
Suckering: N
Virus: N
Brittleness: Y
Ease of Grafting: N

Diseases & Pests

Fireblight: Very Resistant
Phytophthora (Collar Rot, Crown Rot, Root Rot): Resistant
Replant Disease: Resistant
Woolly Apple Aphids: Susceptible






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