Annuals and perennials prefer an evenly moist, loamy, well-drained soil with plenty of organic matter.
Annuals are heavy feeders and like a pH of 6.0-7.5.
Most perennials like a slightly acidic pH of 5.5-6.5.
The soil should be pliable so roots, water, and nutrients can easily pass through it. Be sure you have good topsoil, not sub-soil, and turn the top 6" - 12" of soil (the deeper you dig, the better) and amend the soil by working in organic matter (compost), peat moss, and organic fertilizer. Break up all the clumps and smooth out the bed.
DON'T PLANT ANNUALS UNTIL AFTER THE LAST FROST DATE FOR YOUR AREA HAS PASSED!PERENNIALS CAN BE PLANTED ANYTIME THE SOIL IS WORKABLE!
Don't overcrowd your plants, especially annuals. They need light and air circulation to grow properly. Water early in the day to allow plants to dry before evening and to avoid fungal problems. Annuals and perennials should have a layer of organic mulch to conserve soil moisture and keep weeds down. Shredded leaves, buckwheat hulls, cocoa shells, and bark mulch are good choices.