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G.16 Apple Rootstock (Spring 2021)


A dwarfing apple rootstock in the Emla 9 class that is disease resistant and free standing.. Also known as Geneva 16.

G.16 is resistant to crown rot and fireblight. According to nursery observations, it is also immune to apple scab and replant disease, but susceptible to powdery mildew and WAA. Suckers and burrknots are very rare. This rootstock is highly sensitive to common latent virus, and only virus-free scion wood can be used. Failure to observe this will result in tree death. Slightly more vigorous than M.9, it grows very strongly in the nursery and during the first couple of years in the orchard. Growth settles down with cropping, and by the fifth year trees will be slightly smaller than those on M.26. G.16 is significantly less brittle than M.9 and has much better anchorage. We have, however, seen some union breakage in young trees as they come into bearing, particularly for brittle varieties such as Gala and Honeycrisp. We strongly recommend staking these varieties. Some customer feedback has suggested that trees on G.16 may also be highly drought tolerant. Trees will be precocious and productive, with a tendency to wide crotch angles. This rootstock is especially well suited to the propagation of Mutsu ("Crispin") and other triploids.

This rootstock came from the Geneva, NY breeding program, a cross of Ottawa 3 and Malus Floribunda developed by my father, Dr. Jim Cummins. It is Dad's favorite of his "children."

Volume Pricing

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

Quantity G.16 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.16 is resistant to crown rot and fireblight. According to nursery observations, it is also immune to apple scab and replant disease, but susceptible to powdery mildew and WAA. Suckers and burrknots are very rare. This rootstock is highly sensitive to common latent virus, and only virus-free scion wood can be used. Failure to observe this will result in tree death. Slightly more vigorous than M.9, it grows very strongly in the nursery and during the first couple of years in the orchard. Growth settles down with cropping, and by the fifth year trees will be slightly smaller than those on M.26. G.16 is significantly less brittle than M.9 and has much better anchorage. We have, however, seen some union breakage in young trees as they come into bearing, particularly for brittle varieties such as Gala and Honeycrisp. We strongly recommend staking these varieties. Some customer feedback has suggested that trees on G.16 may also be highly drought tolerant. Trees will be precocious and productive, with a tendency to wide crotch angles. This rootstock is especially well suited to the propagation of Mutsu ("Crispin") and other triploids.

This rootstock came from the Geneva, NY breeding program, a cross of Ottawa 3 and Malus Floribunda developed by my father, Dr. Jim Cummins. It is Dad's favorite of his "children."



Rootstock Details

Category: apple

Tree Height & Spacing

Rootstock size class: Dwarf (30% of Standard)
Tree spacing (natural spread of tree): 8'
Good for wildlife planting?

Properties

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

Diseases & Pests

Apple Scab: Resistant
Fireblight: Immune
Phytophthora (Collar Rot, Crown Rot, Root Rot): Resistant
Powdery Mildew: Susceptible
Replant Disease: Resistant
Woolly Apple Aphids: Susceptible






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