December · Early winter
What to sow in December in Philadelphia
5 crops are in their window this month in Philadelphia — timed to your local frost dates.
Last frost≈ 12 Apr
First frost≈ 11 Nov
Frost-free daysFrom 12 Apr
December averages35°–48°F
Vegetables
1 in season
Rhubarb
Plant crowns · stop picking by midsummer to let the plant recover
Herbs · nothing to sow this month
Fruit
4 in season
Blackberries
Plant canes · thornless varieties are easiest for small gardens
Currants
Plant canes · prune out canes older than three years each winter
Gooseberries
Plant canes · mind the thorns; pick slightly underripe for pies
Raspberries
Plant canes · ever-bearing types fruit the first autumn