Calamagrostis – ‘Overdam’ – Feather Reed Grass – Calamagrostis acutiflora
Dead-Heading Not Necessary
Overdam is cool-season grass. Cool-season grasses put on most of their growth in spring before temperatures begin exceeding 75 degrees Fahrenheit and in the fall when temperatures cool down. They generally maintain good color through the summer but won't grow much when it is hot.
Cut back cool season grasses in very early spring.
Cool season grasses tend to look good even as the weather cools. Leave their foliage in place until spring and then as soon as the snow is gone cut them back. Leave about 1/3 of the plant in place. Trimming cool season grasses too harshly can irreparably harm the plant.
Divide cool season grasses in spring or early fall. Cool season grasses are actively growing in spring and fall. These grasses can be transplanted at either time of the year but early spring is probably the best time to divide. If you do divide them in the fall, be careful that the freeze/thaw cycles of winter don't heave the plants out of the ground, this happened to a couple of my coral bells last winter.
Cut clumps of grass to the ground in late winter before new shoots appear.
Great for landscapes and as a specimen plant
Maintenance Category Easy
Water Category Average
Flower Form Cut Flower, Dried Flower, Grass, Landscape
pH B - pH 5.8 - 6.2
EC (2:1 Extraction Method) 0.6 - 0.9
Fertilization 100 - 150
Light Requirements Medium
Water Requirements Moderate to Moist
Rooting Out Temperature 65 - 72° Fahrenheit
Growing On Temperature 65 - 72° Fahrenheit
Holding Temperature 40 - 50° Fahrenheit
Planting and Timing Information
Early Spring to Summer Finish. Standard PPP.
Finishing Times [weeks]
4-5" and Quart Pot : 4-6
6" and Gallon Pot : 5-7
7-9" Pot :
10-12" and Two Gallon Pot :
Pinching and Growth Regulators
Plugs may be trimmed slightly at transplanting. Early application of Sumagic, 2 ppm drench at 4 oz. per pot 1 week after transplant.
Pest and Disease Management
No apparent pest or disease problems. General pest and disease practices as listed in notes.