[header] How to fertilize flowers organically [title] Add compost that you have either created in your backyard or bought from a garden center. [step] Compost supplies nutrients and balances the ph of the soil, but is not a true fertilizer. [title] Select the pre-made granular organic blend fertilizer that is best for your type of flowers. 
[title] Improve your lawn and flowers by applying kelp meal, which is brown seaweed that contains potash and other trace nutrients. [title] Add bone meal, which contains phosphate and calcium, to improve transplanted flowers and plants, as well as bulbs.