SCIENTIFIC NAME: Malus domestica 'Marshall McIntosh'
COMMON NAME: Marshall Mac Apple; Marshall McIntosh Apple
GARDEN SIZE: Depends on root stock - Dwarf 8-10 ft. tall and wide, Semi-Dwarf 12-15 ft. tall and wide, Standard/Full 15-20’ tall and wide, Espalier varies with culture
USDA ZONE: 5-8
EXPOSURE: Full Sun
WATER & SOIL: Loamy & well drained soil
FOLIAGE: Deciduous; Green
BLOOM TIME: Early - Flowering Group 1
HARVEST TIME: Early-midseason, ripens early September
FRUIT: Medium-sized, round apples. The skin is spring green swirled with muted red and speckled with lenticels. The flesh is tinted green, with a fine-grained and slightly spongy texture. The flavor is tart but tempered by sweetness, with a vinous or wine-like note inherited from Marshall Mac's McIntosh parent.
POLLENIZATION: Not self-fertile - needs a compatible pollenization partner nearby to produce fruit. Due to their close relation, Marshall Mac and McIntosh apple trees cannot cross-pollenize.
POLLENIZATION (Trees that pollenize this one): Anna, Colonnade Scarlet Sentinel, Golden Russet, Zestar!
POLLENIZATION (Trees that are pollenized by this one): Anna, Colonnade Scarlet Sentinel, Golden Russet, Liberty, Zestar!
CARE: Prune while the tree is dormant. Remove water sprouts in June or July. Options for controlling pests, bacterial infections, and fungal disease include dormant oils applied early in the season before blooming, scented insect traps, and copper-based fungicides. DO NOT apply insecticides during blooming. This risks harming bees, which are crucial for pollination and fruit production. If necessary, fireblight can be treated with a streptomycin antibiotic spray during blooming. Apple trees need about an inch of water every 7-10 days, though young trees need a little more during their first growing season as they establish roots. If not enough rain has fallen, give the tree extra water by running a hose at a trickle around the base of the tree until the ground is fully soaked (but not for so long that there is standing water). Waterlogged roots can harm apple trees, so don't overdo it!
DISEASE RESISTANCE: May be moderately resistant to fireblight.
USES: Eating fresh, cooking, juice
TOXICITY: Stems, leaves, and seeds contain cyanide and are therefore toxic to dogs, cats, horses, and humans. The fruit is non-toxic.