Answer: Most annuals need to be started 4-6 weeks before setting out. Before using your propagation box, place a minimum-maximum thermometer in it to find out how cold it gets. Plants like between 65-75 degrees F. Geraniums need to be started 8-10 weeks prior to setting out. They also are very susceptible to rot if there is poor air circulation or soggy soil. The seed should be covered..
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