Test your soil. Purchase a kit that reveals the pH, nitrogen, phosphorous and potassium levels. Alternatively, hire a university extension to perform the test for a nominal fee.
Review the soil needs of your flower varieties, Pansies, for example, prefer a mixture of 5-10- 5, while roses can be grown with an all-purpose fertilizer such as 10-10-10. Vary the ratio based on the time of fertilizer application and plant maturity.
Compare the needs of your flowers with your test results. If your soil is low in nitrogen, a nitrogen-rich manure such as farrow-finish, pig lagoon slurry will be needed.
Put out rubber gloves and wear a long-sleeved shirt and pants when applying manure.
Till soil to break the surface and make it easier to incorporate the manure. Spread manure over the flowerbed and rake it to mix with soil.
Plant seeds or transplant seedlings and bulbs in the spring. Use a finger or stick to make a hole in the ground, drop in the seeds and cover. Follow the directions on the package regarding the depth and numbers of seeds to use. Transplant plants by placing your hand around the base of the plant with your fingers spread, tipping the pot and catching the root system with the soil attached. Squeeze the root ball gently to release knots, and place it in the ground. Cover with soil and do not over-compress the soil around the base of the plant.