Timing is everything so just how do you tell when to do what? One way is by the calendar. Generally speaking the USDA says our last average frost date for spring is April 15. Now, average last frost date is not the last frost date though it does give us a good benchmark to plan by. Dates on a calendar can be fickle though so in addition to knowing the average last frost date there is another, more surefire way to know if conditions in your garden are right for sowing or transplanting certain seeds and plants.
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