The key to growing garden flowers successfully is to match the planting site with the needs of each specific flower. Before selecting plants for any site, consider the amount of sunlight, microclimate temperature, competition from tree roots, and soil drainage and aeration.
Plants vary in the amount of sunlight they require for optimum growth.
Too little sunlight can lead to reduced flowering and leggy plants. Too much sunlight can burn or fade the foliage of shade-loving plants. Light, temperature, and water are closely interrelated. Plants listed as preferring partial shade may tolerate more sunlight if temperatures are moderate and adequate water is provided. Examine the soil for drainage, moisture retention, and aeration.