Why Avocado Trees Grown from Seed Don't Fruit in Florida

Two seed-grown avocados in Punta Gorda—one never bloomed, one blooms but sets no fruit. The issues: seedling genetics, pollination biology, and maturity timeline.

Seedling Avocados: The Genetic Lottery

• Avocados are highly heterozygous. Seedlings rarely resemble parents.
• Many seedling trees are shy bearers or produce poor-quality fruit.
• Time to first bloom: 7–15 years (vs. 2–3 for grafted trees).

Pollination Complexity

• Avocado flowers are protogynous dichogamous: each flower opens female first, closes, reopens male next day.
• Types A and B complement each other's timing. You need both types nearby for good cross-pollination.
• Seedlings' flowering type is unknown until they bloom.
• Even with pollinators, fruit set is low without a compatible partner.

Action Plan

1. Identify flowering type when they bloom (A = morning female / afternoon male; B = afternoon female / morning male).
2. Plant a grafted Type A and Type B (e.g., 'Choquette' A + 'Brogdon' B) within 30 feet.
3. Encourage bees with diverse forage; avoid insecticides during bloom.
4. Graft desired varieties onto your seedlings as rootstock—they're vigorous and adapted to your soil.

Local Resource

Contact UF/IFAS Extension Charlotte County for variety recommendations and pollinator charts specific to Southwest Florida.

Your seedlings make great rootstock. For reliable fruit, graft known cultivars onto them.