Planting Rose of Sharon Seeds: Fall Outdoors or Spring Indoors?

Best: Start Indoors 8 Weeks Before Last Frost

Lancaster, PA (Zone 6). Fall direct-sow works (nature does it), but controlled indoor start = better germination, stronger plants.

Indoor Protocol

1. Timing: Late February–March (8 wks before ~April 30 frost).
2. Separate pots, warm (70°F), moist.
3. Germination: 10–20 days.
4. Harden off: 10 days shade before full sun.
5. Transplant after frost.

Fall Direct Sow (If You Prefer)

• Plant in desired spot now.
• Germination waits for 70°F soil (late May/June).
• Natural selection—toughest survive.

Why Indoor Wins

• No weed competition.
• Control moisture/temperature.
• Earlier, uniform plants.
• Easier to protect seedlings.

Your call. Indoor = more plants, less luck.