Dwarfing
35% of a seedling tree
HP recommended
MAC-9
Michigan Apple Clone 9 (Mark) · मैक-9
About MAC-9
MAC-9 (Mark) is a dwarfing rootstock from Michigan State University, producing trees similar to M.9 in size. It offers better cold hardiness and collar rot resistance than M.9, making it suitable for high-density plantings in cooler climates.
Tree size
Dwarfing — 35% of a seedling tree
DwarfSemiVigorous
Planting
Trees
809–1,133
trees per acre
Spacing (row × tree)3.5 m × 1 m
First cropin 2 years
Productive life15 years
Needs stakes or a trellis
Needs irrigation
Planting notes
Requires permanent staking and irrigation. Good cold hardiness. Suitable for high-density orchards in HP.
Disease and pest resistance
Collar rot
Tolerant
Woolly aphid
Tolerant
Replant disease
Tolerant
Fire blight
Tolerant
Burr knot
Not known
Soil and site
AnchoragePoor
Soil depth needed40 cm
Soil pH6–7
Roots hold the tree weakly: support stakes are essential.
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