Sowing: Direct sow Rocky Mountain Bee plant seeds in late fall, planting the seed just below the surface of the soil; these seeds want light to germinate. For spring planting, combine Cleome Serrulata seeds with moist sand and retailer it within the refrigerator for 30 days earlier than direct sowing. Keep the soil evenly moist till germination, which ought to occur inside 30-35 days; the germination fee may be naturally low. The treated seeds may also be started indoors 6-8 weeks before the final frost of spring; plant the seeds on the floor of a flat, keeping the moisture constant and the temperature round 65 degrees F. This plant grows finest in well drained soil, although it adapts to practically any soil sort. Growing: Water the plants regularly till they turn out to be established. Mature plants also respect watering, although the soil should not be soggy. Remove ideas of the growing stems to encourage branching and bushy development. As the plant grows, it may have help or staking for protection from the wind.