Water weekly during dry spells.
Favorite of hummingbirds, this rabbit- and deer-resistant perennial likes sun and good drainage, and is hardiest in soil that is somewhat moist in summer and dry in winter. Neutral to alkaline soil of moderate to low fertility suits it best – no fertilizer is required. Deadhead promptly to promote secondary flowering and longevity. Use it for long-term color in the dry perennial border or cottage garden, or combine it with other drought-tolerant plants in raised beds, mounds or slopes. (1)
Keep in mind when planting that Red Rocks is thought of as very hardy, so this plant will tend to survive through freezing conditions.By our calculations, you should look at sowing Red Rocks about 63 days before your last frost date.
Needs well drained soil. Drought tolerant with a medium growth rate. (1)
As Red Rocks is very hardy, ensure temperatures are mild enough to plant out - wait until after your last frost date to be on the safe side.