Pumpkin Center, Kern County, California. This article is about the unincorporated community in Kern County. For the unincorporated community in Lassen County, see Pumpkin Center, Lassen County, California.
When to harvest chestnuts? Chestnuts donât ripen at the same time and chestnut harvest time can span as much as five weeks, although the nuts generally ripen in a 10- to 30-day span of time in late August and September. Allow the nuts to fall from the tree naturally.
Growing a Horse Chestnut Tree. The most important factor when growing a horse chestnut tree is location. Horse chestnuts thrive in USDA plant hardiness zones 3-8 in areas having full sun and well-drained, but moist, humus-rich soil. These trees do not tolerate excessively dry conditions.