Raising annuals indoors From Bedding Plants The majority of summer bedding plants are raised from seed early in the year. They may be half hardy annuals such as zinnias, hardy annuals such as alyssum or tender perennials such as zonal pelargoniums, which are treated as half hardy annuals. All are raised by sowing seed in warmth in early spring, growing on and then hardening off before planting out in beds and borders. Many bedding plants can be raised on a windowsill but a greenhouse and heated propagator will give them the best start. The advantages of a greenhouse Raising plants on a windowsill Using a propagator or heated mat Choosing pots and trays Compost/Potting soil Seed sowing technique After sowing the seed Pricking out the seedlings Looking after seedlings Planting out Annual Manual ©copyright 1999 Graham Rice. All Rights Reserved. All Images Digitally Watermarked.