Sowing flowers for your garden beds ensures bright color and texture in your yard through spring, summer and fall. Flowers come primarily in annual varieties which must be replanted each year and perennial varieties that return year after year, with a few biennials that take two years to complete their life cycle. Most garden flowers are sown from seed indoors in spring, with a few growing from perennial bulbs that are sown in either fall or spring.
Fill individual seed starting pots or trays with a sterile potting mixture. Mix your own growing medium by combining 1 part peat moss, 1 part sterilized compost and 1 part vermiculite.
Moisten the soil in the pots so that it is evenly moist throughout but not soaking wet. Moisten either after or before you place it in the pots.
Sow two seeds per pot, or plant flower seeds in rows 3 inches apart in trays. Sow medium and large seeds to a depth twice that their diameter, and sow small seeds directly on the soil surface and cover with an 1/8 inch layer of vermiculite.
Cover the containers with a plastic bag and place in a 65 F room to germinate. Most flowers take between seven and 21 days to germinate, refer to seed packet for exact timing.
Remove the plastic bags once seedlings surface. Place in a warm, well lit window or under grow lights. Keep soil moist until you transplant the flowers to the garden or to their permanent plants.
Prepare a well-drained garden bed in full sun in fall for spring flowering bulbs or spring for summer flowering varieties. Lay a 3 inch layer of compost over the bed and till it in to a 10 inch depth with a hoe to improve drainage and soil quality.
Sow each bulb to a depth three times its width. Plant in the ground with the root side down. Plant rhizomes, roots and other bulb-like structures so the growing eyes are on top.
Space small bulbs 2 to 3 inches apart and larger bulbs 6 inches apart. Plant in clusters as opposed to rows.
Water the garden bed well after sowing the flower bulbs. Cover in a 3-inch layer of organic mulch to preserve soil temperature and moisture.