What to plant this week in Zone 1a
Welcome to the deep freeze of Zone 1a, where last frost won't arrive until mid-June and summer ends by August 15. Since there are no plants ready to sow, transplant, or harvest this week, your focus is entirely on winter hardening and garden planning.
In the ground
Sow this week
No direct sowing windows open this week.
Move out
Transplant this week
Nothing is due to go out this week.
Coming ripe
Harvest soon
No harvest windows opening just yet.
Do this now
Seasonal tips
- Protect perennial bulbs and tender shrubs with thick layers of straw or evergreen boughs against extreme cold snaps down to -60°F.
- Inspect greenhouses for frost damage and ensure insulation is tight to preserve any stored seedlings before the long winter.
- Plan your succession sowing schedule now so you can start seeds indoors immediately when the June 15 frost date approaches.
- Organize your tool shed and clear garden paths of snow drifts to prepare for early spring work.
Keep watch
Pest & disease watch
- Monitor storage areas for overwintering pests like aphids or mites that may hide in protected structures during this dormant season.
- Check seed stocks for insect eggs before storing them, as cold temperatures can sometimes trigger hatching later in the season.
- Inspect greenhouse frames and screens for any damage caused by winter wind or wildlife seeking shelter.
Water
Watering this week
One more thing
Use this quiet period to catalog your garden layout and order seeds online so they arrive just in time for the June planting window.