The Flavortop grows as a full-size tree, reaching 12 to 15 feet tall and 10 to 15 feet wide, and is hardy outdoors in zones 5 through 9. It is best planted in the ground in a sunny, open spot, though it can be kept smaller in a large container or with regular summer pruning if space is tight.
Planting
- Choose a site in full sun with good air movement and at least 12 to 15 feet of clearance; nectarines need all-day sun to ripen sweet fruit and dry quickly after rain.
- Provide well-draining soil. Nectarines dislike wet feet, so avoid low spots where water collects, and amend heavy clay with compost.
- Dig a hole twice as wide as the root ball but no deeper, loosening the sides so roots can spread.
- Set the tree so the graft union (the swollen knob low on the trunk) sits 2 to 3 inches above the soil line; do not plant too deep.
- Backfill with native soil, firm gently, and water in thoroughly to settle out air pockets. Spread 2 to 3 inches of mulch over the root zone, keeping it several inches back from the trunk.
Care & maintenance
- Water. Keep the soil evenly moist the first two seasons, roughly an inch a week. Established trees need deep watering during dry spells and especially as fruit sizes up.
- Feed. Apply a balanced fruit-tree fertilizer in early spring as growth begins; avoid heavy late-season nitrogen, which pushes soft growth that won't harden before winter.
- Light & temperature. Full sun is essential. The Flavortop is hardy in zones 5 to 9 and needs a winter chill period to fruit well; in the colder end of its range, plant in a protected spot away from frost pockets.
- Prune. Nectarines fruit on one-year-old wood, so prune annually in late winter to an open-center (vase) shape, removing old, crowded, and dead wood to keep light reaching the fruiting branches.
- Pollinate. The Flavortop is self-fertile, so a single tree will set fruit on its own. A second nearby stone-fruit tree is not required.
- Pests & disease. Watch for peach leaf curl, brown rot, and aphids or peach twig borer. A dormant-season fungicide spray and good sanitation (removing fallen, mummified fruit) prevent most problems.
- Harvest. Fruit ripens from June to August. Pick when the ground color shifts from green to deep yellow and the fruit gives slightly to gentle pressure and pulls free with a light twist.