Key Features
- Variety: Boswellia sacra, a distinctive frankincense-producing tree native to dry regions of Arabia and Northeast Africa.
- Flowers: Small white to yellow-white flowers with yellow-orange floral structures.
- Plant Characteristics: Woody, drought-adapted tree with papery peeling bark and branches bearing clustered compound leaves.
- Garden Uses: Excellent for warm-climate landscapes, botanical collections, specialty gardens, and container growing while young.
- Unique Appeal: Known for its aromatic resin and fascinating connection to the long history of frankincense production.
Growing Benefits
- Adds an unusual desert-adapted tree to warm-climate plant collections.
- Provides an engaging seed-growing project for patient gardeners.
- Thrives in sunny locations with excellent drainage and relatively poor soils.
- Develops distinctive papery bark and an attractive branching habit.
- Offers an opportunity to grow a historically significant frankincense-producing species.
Seed Specifications
Common Name: Frankincense Tree, Sacred Frankincense
Botanical Name: Boswellia sacra Flueck.
Plant Type: Perennial woody shrub or small tree
Colors: White to yellow-white flowers; pale brown to reddish-brown bark
Height: About one and a half to eight meters in natural growth, depending on conditions
Sunlight: Full sun to very bright light
Soil: Sandy, rocky, porous, sharply draining soil
Water: Light to moderate during establishment; sparse watering once established
Germination Time: Variable; fresh seed can germinate relatively quickly under suitable conditions, but germination rates can vary considerably between seed lots
Sowing Depth: Surface sow or cover very lightly
Spacing: Allow generous room as plants mature; container seedlings can initially be grown individually
Growing Zones: Best suited to warm, frost-free climates; protect young plants from cold
Flowering/Maturity: Flowering occurs after establishment; resin production requires a mature tree and is not an immediate result of seed planting
Uses: Ornamental specimen, botanical collection, dry-climate landscaping, specialty container growing, and frankincense-producing tree collections.
Growing Tips
- Use a very well-draining sandy or gritty growing medium to prevent excess moisture around the roots.
- Sow seeds shallowly because the lightweight seeds should not be buried deeply.
- Keep the growing medium lightly moist during germination without allowing it to become waterlogged.
- Give established seedlings abundant light and gradually acclimate them to stronger direct sunlight.
Seed Storage
Store seeds in a cool, dry, dark place inside a sealed, moisture-resistant container. Keep them away from humidity, heat, and direct sunlight. Because Boswellia sacra seed quality can vary substantially and empty seeds may occur, sowing relatively fresh seed is preferable.
Unique Facts About Seeds
- Boswellia sacra is one of the principal trees associated with traditional frankincense production.
- Research has found that seed lots can contain a high proportion of empty seeds, contributing to highly variable germination results.
- A published germination study found that soaking Boswellia sacra seeds in water for several hours helped separate many empty or insect-damaged seeds and improved germination in the tested seed lots.
- The tree naturally grows in dry desert and shrubland environments and can reach several meters in height, with papery peeling bark and resin-bearing tissues.