Casimiroa Edulis: A Tropical Tree Surviving 4 Years in Sakarya

Casimiroa edulis — also known as White Sapote — has been living in the HE-QA garden for 4 years. This rare fruit tree from the highlands of Mexico and Central America takes some winter damage each year but keeps bouncing back every spring. We haven't seen fruit yet, but the fact that it has survived in Sakarya at all is an achievement in itself.

What Is Casimiroa Edulis?

Casimiroa edulis is a tropical fruit tree from the Rutaceae family, native to the cool highland regions of Mexico and Central America. It is known as White Sapote and bears creamy, sweet fruits similar in texture to avocado. Despite its tropical appearance it is relatively cold-tolerant, making it an interesting choice for gardens at the edge of the Mediterranean climate zone.

4 Years in Sakarya: How Does It Handle Winter?

Casimiroa's cold hardiness is rated USDA zones 8–10. Young trees can be damaged at -4°C and mature trees at -3°C. Sakarya winters occasionally drop below these thresholds, so our tree takes some damage each year — branch tips may freeze and leaves drop. But the root system stays intact and the tree reshoots every spring. Having repeated this cycle for 4 years suggests it has developed a degree of adaptation to Sakarya's conditions.

When Will It Fruit?

Grafted trees typically begin bearing in 3–4 years. Seedling trees can take 7–8 years. Our tree is now in its fourth year — right at the threshold where fruit might be expected. However, the annual winter damage may push the schedule back. We are waiting patiently.

Care

• Sun: Full sun essential. Tropical origins mean it needs plenty of light.
• Soil: Well-drained, pH 5.6–7.0. Adapts to clay, sandy, or limestone soil. Roots are shallow and spreading — plant away from other trees and structures.
• Watering: Regular when young; after age 4, water only during prolonged drought. Overwatering causes root rot.
• Fertilising: Balanced fertiliser every 6–8 weeks in year one; 2–3 times a year for mature trees.
• Winter protection: Mulching at the base and covering with fleece in hard frosts reduces damage risk, especially while young.

Why Grow It?

Casimiroa fruit is creamy, sweet, and mildly vanilla-scented, with an avocado-like texture when ripe. Almost impossible to find in Turkish markets, growing it at home is a perfect permaculture choice — and a prized addition to any rare fruit collection.