Aralia spinosa is a deciduous Tree growing to 9 m (29ft 6in) at a slow rate.
It is hardy to zone 4 and is not frost tender. It is in flower from Aug to September, and the seeds ripen from Oct to November. The flowers are hermaphrodite (have both male and female organs) and are pollinated by Bees.
The plant prefers light (sandy), medium (loamy) and heavy (clay) soils and can grow in nutritionally poor soil.The plant prefers acid, neutral and basic (alkaline) soils..It can grow in full shade (deep woodland) or semi-shade (light woodland).It requires moist soil.
Genus - Aralia
Species - Spinosa
Common name - American Angelica Tree
Germination rate - 85%
Pre-Treatment - Required
Plant type - Large shrub / small tree
Vegetation type - Decidious
Hardiness zones - 4 - 8
Exposure - Full Sun, Partial Shade
Height - 10'-30' / 3 - 9 m
Spread - 15'-20' / 4.60 - 6 m
Growth rate - Medium
Bloom season - Summer
Leaf / Flower color - Green / White
Soil PH - Acidic, Neutral, Alkaline
Soil type - Clay, Loam, Sand, Well Drained
Water requirements - Drought Tolerant, Average Water
Landscape uses - Feature Plant, Foundation, Mixed Border
1. Soak in a warm clean water for 12 hours. Fill a seeding tray with damp seed starter potting medium. Plant aralia seeds just under the surface of the medium. Place the seed tray in a clear, plastic, sealable bag, or place a plastic dome on top of the tray. 2. Cold-stratify the seeds for 60-90 days. Stratification is putting seeds into a cool, dim environment to induce germination. Stratify seeds by sowing them in the late fall or winter and placing the tray in the garage or on the porch. If it is not fall or winter, place the seed tray in the refrigerator. Periodically mist the soil with water to keep the medium damp. 3. Remove any seeds that start to sprout during cold stratification. Transplant the sprouted seeds into individual, small pots, using high-phosphorous soil to promote root establishment. Place the pots in a warm environment with indirect light. After six to eight weeks of cold stratification, remove the tray and place it in the warm area with indirect light. Continue to transplant seeds as more sprouts form. 4. Transplant indoor aralias into larger pots, as needed. Plant aralias in humus-rich soil and keep the soil lightly dampened. Move aralias intended for the outdoors in spring, when the plant is well established. Aclimate plants to the outdoors gradually before leaving outside overnight. 5. Begin a fertilization regimen after the aralias are established. Fertilize aralias with full-strength liquid organic shrub fertilizer monthly during spring and summer. Fertilize aralias with half-strength fertilizer in fall and winter.
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