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Native to rocky slopes and moist ravines through much of western North America, this small, hardy, relatively drought tolerant maple makes a good choice for low-maintenance landscapes within its native range. An upright, typically multistemmed shrub or small tree, it has three- to five-lobed, shiny, medium-green leaves that sometimes are divided into three leaflets. Fall color is a yellow to orange. Although rather sparsely branched and rangy in shady sites, it forms a much denser plant in partial sun. Its greenish yellow flowers appear in early spring, followed by two-winged fruits that mature from green to brown. The smooth, red-brown to gray-brown bark becomes rough on older stems.
Give this maple partial shade and well-drained, acidic to slightly alkaline soil. It is useful as a specimen or for massing in naturalistic and informal plantings. (source: learn2grow.com)
Genus - Acer
Species - Glabrum
Common name - Douglas Rocky Mountain Maple
Pre-Treatment - Required
Hardiness zones - 4 - 8
Height - 8 m
Spread - 6 m
Plant type - Tree
Vegetation type - Deciduous
Exposure - Partial Sun, Partial Shade
Growth rate - Medium
Soil PH - Acidic, Neutral, Alkaline
Soil type - Loam, sand
Water requirements - Low or Average Water
Landscape uses - Hedges, Mixed Border, Screening / Wind Break
Germination rate - 84%
Bloom season - Partial Sun, Partial Shade
Leaf / Flower color - Green, yellow orange in autumn / Yellow Green
| Useful Info | |
| Germination | 1. Start the cold stratification process one month before the beginning of spring. 2. Place the seeds in a glass bowl and cover with room temperature water. Allow the seeds to soak for a minimum of 24 hours but no longer than 48 hours. 3. Hold a handful of sterile peat planting medium under a running faucet until the peat is soaked. Squeeze most of the water out of the peat, leaving it moist but not soggy. Place the moist peat into a zip-lock plastic bag. 4. Remove the seeds from the bowl of water and rinse them off under clean running water. Place up to three seeds into the plastic bag containing the peat. Use more peat and plastic bags if you want to germinate more than three seeds. 5. Push the seeds into the peat and seal the plastic bag. Shake the bag to distribute the peat so that it covers the seeds completely. The seeds must be buried in the moist peat in order to germinate. 6. Place the sealed bag in the bottom of the refrigerator. This will serve as the cold stratification. The seeds need to be kept at 34 to 46 degrees Fahrenheit for a minimum of 35 days, but not longer than 90 days. 7. Open the plastic bag periodically to make sure the peat is still moist. Add water as needed to restore the moisture. 8. Check the weather forecast after 35 days. You can plant the seeds outdoors if all danger of frost has passed. You can wait up to 55 more days, if there is still a possibility of frost and plant the seeds as late as early summer. 9. Plant the seeds by removing them from the peat and rinsing them with clean water. Bury the seeds 1/4 to 1 inch deep into the soil, ensuring that the seeds are covered. Keep the soil moist until the seeds sprout. |
