Gala is hardy outdoors in USDA zones 5–8 and grows into a full-size backyard tree, reaching 10–20 ft. tall and 8–10 ft. wide at maturity. Choose a permanent, in-ground location in full sun where it has room to spread and good air movement.
Planting
- Pick a site in full sun (at least 6–8 hours daily) with deep, well-draining soil; avoid low spots where water collects or frost settles.
- Dig a hole twice as wide as the root ball but no deeper, loosening the sides so roots can push outward.
- Set the tree so the graft union — the swollen knob low on the trunk — stays 2–3 inches above the soil line; planting too deep can cause the scion to root and lose its dwarfing or disease benefits.
- Backfill with the native soil, firm gently to remove air pockets, and water in deeply to settle the roots.
- Spread 2–3 inches of mulch over the root zone to hold moisture and suppress weeds, keeping the mulch a few inches back from the trunk to prevent rot and rodent damage.
Care & maintenance
- Water. Keep the soil consistently moist the first two seasons — roughly an inch per week — then water deeply during dry spells and while fruit is sizing up.
- Feed. Apply a balanced fertilizer or one formulated for fruit trees in early spring as growth begins; avoid heavy late-summer feeding, which pushes tender growth into fall.
- Light & temperature. Full sun produces the sweetest, best-colored fruit. Gala needs winter chill to set a crop and is reliably cold-hardy through zone 5.
- Prune. Prune in late winter while dormant to open the canopy to light and air, removing dead, crossing, or inward-growing wood and maintaining a central leader or open-center shape.
- Pollinate. Gala is not reliably self-fertile. Plant a compatible apple variety (such as Fuji, Golden Delicious, Granny Smith, or Red Delicious) that blooms at the same time within about 50 feet to ensure good fruit set.
- Pests & disease. Watch for codling moth, apple maggot, aphids, and fungal issues like apple scab and cedar-apple rust; a routine orchard spray program and good sanitation (raking fallen leaves and fruit) keep most problems in check.
- Harvest. Galas ripen in October–November. Pick when the background color shifts from green to yellow and the fruit twists off easily with a gentle upward lift.