Post Oak (Quercus stellata) is a medium-sized deciduous tree native to the southeastern and south-central United States. It plays a crucial role in agroecology and regenerative agriculture as a keystone species, supporting biodiversity by providing habitat and food for wildlife, including birds and mammals. The tree's distinctive cross-shaped leaves are deeply lobed and leathery, and its acorns are a vital food source for many animals. In a food forest system, Post Oak serves as an overstory layer, offering shade and microclimate regulation. Historically, its wood has been used for construction due to its strength and resistance to decay. Guild companions include nitrogen-fixing plants like clover and understory shrubs such as American beautyberry, which benefit from the dappled shade and contribute to soil health.
Growing Details
Post Oak thrives in full sun and well-drained soils, particularly sandy or rocky types. Before planting, prepare the soil by incorporating organic matter to improve drainage and fertility. Mulching around the base helps retain moisture and suppress weeds. Companion plants include understory shrubs like American beautyberry and nitrogen-fixing ground covers such as clover. Avoid overwatering, as Post Oak is drought-tolerant once established. Harvest acorns in the fall, and store them in a cool, d
Edible Parts
Seed
Tags
Keystone Specie Carbon Farming Attracts Wildlife Fire Wood Building Wood Windbreak Erosion Preventing Visual Appeal
Range (Based on GBIF Data)
The map shows known occurrence points of <strong>Quercus stellata</strong> recorded in scientific biodiversity databases.
Source: <a href="https://www.gbif.org" target="_blank">GBIF.org</a> โ Global Biodiversity Information Facility
Location & Timing
native geo location: Southeastern and south-central United States
applicable geo region: North America
language used: en
Flowering:
middle
of April for 30 days
Harvest:
middle
of September for 60 days
Seed Start:
?
Indoor Start:
Transplant:
Uses & Benefits
Edible Rating:
(2/5)
edible uses: The acorns of Post Oak can be processed to remove tannins and used as a food source. They are typically leached to remove bitterness and can be ground into flour or used as a nutty addition to various dishes. Acorns are available in the fall and should be collected once they fall to the ground.
Medicinal Rating:
(1/5)
medicinal uses: Traditionally, the bark of Post Oak has been used for its astringent properties in treating minor wounds and skin irritations. It can be prepared as a decoction or poultice.
health concerns: Acorns must be properly leached to remove tannins before consumption to avoid digestive discomfort. Consuming raw acorns can lead to nausea and other digestive issues.
other uses: The wood of Post Oak is highly valued for its strength and resistance to decay, making it ideal for fence posts, furniture, and flooring. It is also used as firewood due to its high heat output.
Scientific Literature
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Botanical data
specie: Quercus stellata
common names: Post Oak; Iron Oak; Cross Oak
family: Fagaceae
sub family:
tribe:
sub tribe:
genus: Quercus
Growing Conditions
area needed: 100.0 m
spacing: 10.0 m
growing difficulty: Medium
Deciduous / Evergreen: Evergreen
Seed Temp (Opt/Min/Max): 15ยฐC / 10ยฐC / 20ยฐC
Plant Temp (Opt/Min/Max): 20ยฐC / -5ยฐC / 35ยฐC
water demands: Low
humidity:
light demands: High
root type: Deep
frost tender:
hardness:โโโโโโโโโโ(7/10)
first harvest: 20 years
life span: 300 years
succession: Late
growth rate: Slow
max height: 20.0 m
max width: 15.0 m
soil preference:
Medium (Loam)
pH preference:
Neutral
flower type:
Monoecious
growth details: Post Oak thrives in full sun and well-drained soils, particularly sandy or rocky types. Before planting, prepare the soil by incorporating organic matter to improve drainage and fertility. Mulching around the base helps retain moisture and suppress weeds. Companion plants include understory shrubs like American beautyberry and nitrogen-fixing ground covers such as clover. Avoid overwatering, as Post Oak is drought-tolerant once established. Harvest acorns in the fall, and store them in a cool, d
Potential Disturbances: Post Oak is susceptible to oak wilt, a fungal disease. Natural pest management includes promoting beneficial insects like ladybugs and lacewings to control aphids and caterpillars. Companion planting with garlic or chives can help repel scale insects. Neem oil can be used as an organic spray for pest control.
Growth Timeline
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