“Etsy rescue planted in 2024. Pushing the zone as far as it goes.”
Background
Theobroma cacao (Greek for food of the gods) is native to the Amazon basin and the source of chocolate. The three main cultivar groups are Forastero (bulk of world production), Criollo (rarest, finest flavor), and Trinitario (their hybrid). Matt's plant is an unidentified seedling rescue, so its group is unknown. The UA arboretum notes 'Theobroma' means food of the gods, and cacao was central to Aztec, Maya, and Olmec culture and religion.
Distinguishing traits
Small evergreen tree (15-30 ft in the tropics) with large glossy leaves; flowers and large melon-shaped pods grow directly on the trunk and older branches (cauliflory). Pods ripen yellow to orange or red and contain 30-40 beans; first crop at 3-4 years. The UA arboretum describes cacao as a rainforest understory tree with large dark green leaves and small flowers borne directly on the trunk and branches.
Desert care — zone 9b
- Chill hours
- None; needs year-round warmth.
- Cold hardiness
- Zone 11 only; damage or death below 50°F, and flowering requires temperatures at or above 68°F. Greenhouse-only in zone 9b with winter heat. The UA arboretum rates it very frost tender (USDA 10b-11), advising to keep it above 50°F with humidity above 70%.
- Heat tolerance
- Paradoxically poor in Phoenix: growth is limited above 90°F, so desert summers stress it too. Needs shade, constant humidity (70-80%), and misting.
- Water
- Needs near-constant soil moisture; drought stress causes leaf and flower drop. Never let it dry out, but avoid waterlogging. The UA arboretum rates water use as moderate, with consistently moist but well-draining, slightly acidic soil.
- Soil
- Rich, well-drained, organic, slightly acidic to neutral (pH 5.0-7.5).
- Sun exposure
- Light shade; an understory tree that burns in direct sun.
Where to buy
- FruitForestPlants (Etsy)