HOW TO GROW COLUMBINE, ROCKY MOUNTAIN
Direct sow outdoors or in cold frame in spring in the North, fall in the South. Sow at 41˚F for, 3 months, then place in 68˚F for three months, keep moist. Germination is irregular, often several months, so do not discard seeds flats if no germination. Can grow in part shade. Cutting flowers encourages new blooms. Surface sow, press into soil, do not cover. Soil pH 5.1–6.0. Hardiness zones 3–8. Perennial.
Usual seed life: 3–5 years.
Planting Depth surface
Soil Temp. Germ. 65–70˚F stratify
Days to Germ. 6 months
Plant Spacing 9-12”
Row Spacing 18–24”
Days To Maturity 1 year
Full Sun, Moist Well Drained Soil