Manual of Rootstocks

G.41Dwarf M9 class rootstock

Used for: Apple
Developed by: Cornell University
Country of origin: United States
Introduced: 2005
Parentage: M26 x Robusta 5

Early bearing, high yield efficiency, graft union strength similar to ‘M.9'. Well adapted to most soils. Wide crotch angles. Shown to be a good rootstock for ‘Honeycrisp' and other less vigorous varieties, has good tree survival, superior yield performance to ‘M.9', similar fruit size as ‘M.9' and less bienniality than ‘M.9'.

In trials in British Columbia, Canada, ‘Geneva 41' had fewer root suckers and higher yield efficiency than ‘M.9- T337' '.

Performance of ‘G.41' in France as reported in 2001:
•    Tree size was 20% smaller than ‘M.9 Pajam® 2'at 2 sites.
•    Fruit size was similar to ‘M.9 Pajam® 2'.

There is some concern about weak bud unions at the nursery and during orchard planting. Risk of union breakage appears to increase as the size of the nursery stock increases.

Cold Hardy: very, but does well in warmer climates, range not fully determined

Replant Complex: tolerant. ‘G.41' grows vigorously and establishes a very productive canopy from a whip or unbranched tree when planted in replant situations. A trial with ‘Fuji' at a Vantage, Washington orchard demonstrated the growth and productivity of these rootstocks when bench-grafted and planted in place in the orchard.

G.41 rootstock characteristics

  • Species compatibilityApple
  • Vigour % of standard30% - 40%
  • Rootstock size classDwarf
  • PrecocityPrecocious
  • Support requiredPermanent support
  • Cold-hardinessCold-hardy
  • DeveloperCornell University
  • Country of originUnited States
  • Woolly aphidSome susceptibility
  • Fire blightSome resistance
  • Burr knotsFew
  • Replant complexVery tolerant
  • Root suckersFew

See also

  • Bud 9

    Bud.9 induces early fruiting and is compatible with most cultivars, needs well drained soils, grows a dense, heavy flowered tree, and has high yield efficiency. B.9 works well in high density planting.

Find our more about this rootstock in the 'Manual of Worldwide Temperate Zone Fruit and Nut Tree Rootstocks'.

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