Fertilizer in measured doses

To get the annuals and perennials in your flowerbeds bloom abundantly, a single dose of 20-20-20 fertilizer in the spring will do the trick. Three weeks to a month later, follow this up with a single dose of fertilizer for flowering plants 15-30-15 (when you start seeing buds or just before) which should be sufficient to assure vigorous plants as long as they are growing in adequate soil.