Sowing Seeds Outdoors
Seeds of hardy annuals and hardy perennials may be sown directly outdoors March to June, whenever the ground can be easily worked up into a fine seedbed. These will stand some frost and may germinate and grow best at cool temperatures.
Seeds of half-hardy annuals may be sown outdoors in April & May. These need the warmer soil temperatures to germinate. Early volunteer seedlings of sunflowers, and nasturtiums, for example, have emerged in the last couple of days.
Seeds of tender perennials may be sown outdoors in May & June and grown as annuals.