Sweet Thorn

Acacia karroo, Fabaceae

Zones

9–11

Layer

Canopy

Lifespan

Perennial

Growth

Fast

Guild Roles

ProducerNitrogen FixerWindbreakShade Provider

Growing Conditions

Sun

Full Sun (preferred)

Water

Low (established)Moderate (seedling)

Soil pH

6 – 8.5

Tolerances

Drought

Frost

Heat

Pest Resistance

Disease Resist.

Companion Plants

Pale Desert ThornLycium pallidum

Nitrogen FixationShade Provision

Yeheb BushCordeauxia edulis

Nitrogen FixationPollinator Sharing

African BoxthornLycium ferocissimum

Nitrogen FixationNurse Plant

Prairie Flameleaf SumacRhus lanceolata

Nitrogen FixationBeneficial Insect Habitat

Arjuna TreeTerminalia arjuna

Nitrogen FixationBeneficial Insect Habitat

Bastard Brandy BushGrewia bicolor

Nitrogen FixationPollinator Sharing

Sweet BambooDendrocalamus farinosus

Nitrogen FixationWind Protection

Mexican LovegrassEragrostis mexicana

Nitrogen FixationBeneficial Insect Habitat

Mediterranean SaltbushAtriplex halimus

Nitrogen FixationWind Protection

Antagonistic Plants

Blackbrush AcaciaVachellia rigidula

Both Acacia species produce allelochemicals and compete for deep water resources in semi-arid zones

Emory OakQuercus emoryi

Oak produces allelopathic compounds that can inhibit acacia establishment

East African Doum PalmHyphaene compressa

Palm and acacia competing for water resources and canopy space in African savannas

European BuckthornRhamnus cathartica

European buckthorn produces allelopathic compounds that can inhibit nitrogen-fixing acacia species

Uses

Functions

Nitrogen FixationDrought-Tolerant Food ProductionWindbreakFuel Wood

Edible Parts

GumPodsSeeds

Medicinal Uses

Wound HealingDigestive AidRespiratory Ailments

Common Questions

What zones does Sweet Thorn grow in?

Sweet Thorn grows in USDA hardiness zones 9 through 11.

Is Sweet Thorn a nitrogen fixer?

Yes, Sweet Thorn is a nitrogen fixer and can help provide nitrogen to neighboring plants in a guild or polyculture.

What are good companion plants for Sweet Thorn?

Good companions for Sweet Thorn include Pale Desert Thorn, Yeheb Bush, African Boxthorn, Prairie Flameleaf Sumac, Arjuna Tree.

Design guilds with Sweet Thorn and see companion relationships visually.

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