Zones

Zone 4a planting guide

A short, bright summer. Frost-free weeks are the whole argument. Indoor starting is how fruit happens.

Last spring frost
May 12
First fall frost
Sep 25
Winter low
−30 to −25°F

The trap

Buying 80-day heirlooms because they look like a garden. They will not finish.

What actually finishes

Early Girl, Provider beans, kale, garlic. A heat mat in March is worth more than a fifth tomato variety.

This week in Zone 4a

Plan, don't sow

Order seed. Sketch the bed. Indoor starts are still weeks out.

Nothing urgent this week in this zone. Use the calendar for the year view, or browse crops to plan.

Crops for this zone

Year at a glance

  1. January

    Rest. Inventory leftover seed. Do not buy 40 tomato varieties.

  2. February

    Plan, order, or rest — match the frost dates at the top of this page.

  3. March

    Start peppers indoors. Order the last of the seed. Do not sow outdoors.

  4. April

    Start tomatoes indoors. Cool crops can be sown under cover or in a cold frame.

  5. May

    Typical last-frost month. Harden off. Direct-sow radish, lettuce, peas if you have not.

  6. June

    Warm soil. Beans, squash, basil, zinnias, cucumbers. Transplant tomatoes.

  7. July

    Fall greens in now if you have not. Count days. Skip new long-season fruit.

  8. August

    Last radish and spinach. Prep garlic ground. Harvest the tender things.

  9. September

    Typical first-frost month. Plant garlic. Mulch. Take notes while you remember the year.

  10. October

    Plan, order, or rest — match the frost dates at the top of this page.

  11. November · now

    Plan, order, or rest — match the frost dates at the top of this page.

  12. December

    Rest. Inventory leftover seed. Do not buy 40 tomato varieties.

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The sow list

A note when it is time to sow

Seasonal, not daily. We will send what to start in your zone, and skip the rest of the year.

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