Care After Planting
All seeds need moisture to germinate. Wildflowers require more than grasses, but over watering should be avoided. If possible, plantings should be kept moist during early stages of development. Light watering three or four times a week will ensure optimum germination. On large areas where irrigation is not possible, one or two timely rains will usually get things going. A very critical point for seedlings is about two weeks after emergence. If hot, dry conditions persist, supplemental watering will be beneficial.
Native plants can exist under extremely adverse conditions. Heat and drought are generally tolerated, but additional watering can enhance establishment and prolong bloom periods. However, over watering can promote weeds and disease. Other than starter fertilizer, fertilizers are generally not required unless soils are extremely poor and low in organic matter. Too much fertilizer can cause plants to go vegetative at the expense of blooms and seed heads.
As your planting matures, weed problems will decrease. Perennial weeds may persist though, and may need to be controlled. This can be done by hand weeding. Care must be taken when hand weeding as small wildflower plants may be uprooted at the same time.
Wildflower seedings become much more competitive in the second and following years as more perennials develop. Commercial herbicides are available for over the top grass control on established flower stands. CONSULT YOUR LOCAL GARDEN STORE OR COUNTY EXTENSION SERVICE.