Quince · Philadelphia, Pennsylvania, United States
When to plant quinces in Philadelphia
Main outdoor window
2 Nov - 31 Mar
The window this page is built around.
Timed from last spring frost
14 April
In Philadelphia, on your chosen risk.
Ready to pick
1 Oct - 30 Nov
If you plant at the start of the window.
The average last frost. Half of all years are later than this.
Step by step in Philadelphia
Each window is a range, not a single day. Earlier in the range buys you a longer season; later in it buys you a safer one.
Plant the tree
2 Nov - 31 Mar
Any time the plant is dormant and the ground is neither frozen nor waterlogged: after leaf fall in autumn, or at the end of winter before growth restarts.
Harvest
1 Oct - 30 Nov
Quinces through the year
Against the frost risk in Philadelphia
Why these dates
Plant dormant. Quince flowers noticeably later than apple or pear, which makes it a sensible choice in a frost pocket where the earlier-blooming tree fruit keeps losing its crop.
Quinces are planted once and then left in place, so there is no sowing offset to resolve. What matters in Philadelphia is the shape of the year: this crop is dormant through the winter and is planted while it sleeps, any time between leaf fall in autumn and the restart of growth in spring, so long as the ground is neither frozen nor waterlogged. That is why the window below spans the cold months rather than sitting in the middle of the growing season.
Hardiness is not the obstacle here. Philadelphia is zone 7a, comfortably inside the range this crop is rated for, so an established plant should come through an average winter without protection.
Do not expect a crop in the first year. A plant set out now should give its first worthwhile pick around year 4, and will then produce every year after that, which is what makes the planting decision worth getting right the first time.
Also in Philadelphia
Other fruits to time
Growing quinces in Philadelphia
When should I plant quinces in Philadelphia?
Aim for 2 Nov - 31 Mar in an average year. If you would rather not gamble on the weather, wait until 22 Oct - 9 Apr - by then frost has finished in nine years out of ten.
When will quinces be ready to harvest in Philadelphia?
Expect to start picking around 1 Oct - 30 Nov, based on 150 to 180 days to maturity from the planting date calculated for this location.