If you're thinking of planting flower seeds, you better get your gear ready and wait for spring to come. What makes the spring perfect for sowing new flower seeds are the spring rain and the mild temperatures of the season. For most cases, flower seeds can be planted when frost is no longer a threat. Particularly, annual flower seeds depend on warm weather and spring rain for it to withhold and blossom. When the flowers are not exposed to the rain due to warm weather, do make sure to generously water the flower seeds. When the condition of the soil is too dry, adding a potting soil or peat moss mixture would be helpful in ensuring the flower seeds develop and blossom into nice flowers.