Fall Planting of Tall Asters in Zone 7 (Long Island, NY)

A gardener bought 36-inch tall asters in fall and asks whether to plant now or overwinter in pots.

Plant Now

Plant as soon as possible. Fall planting allows root establishment before winter. The more frosts they endure in pots, the higher the risk of root damage or death.

Planting Steps

1. Dig hole twice as wide, same depth as pot.
2. Loosen root ball gently.
3. Plant at same level. Backfill with native soil amended with compost.
4. Water deeply.
5. Apply 2-3 inches of mulch (shredded leaves, straw) after ground freezes.

Why Not Overwinter in Pots?

Pots freeze solid, killing roots. Ground provides thermal buffering. Zone 7 winters are mild enough for fall planting success.