SoilStack | Know before you sow.

USDA Plant Hardiness Zones — 2023 Data

Explore Growing Zones

Every ZIP maps to a USDA zone. Your zone determines frost dates, planting windows, and which varieties thrive in your area.

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Hardiness Zones

Click any zone to see details · Enter your ZIP to find yours Show full map

Data: USDA Plant Hardiness Zone Map, 2023. PRISM Climate Group, Oregon State University.

Why SoilStack

The plan that shows its work.

Every date explained. Every weather shift handled. Adapted to your effort level.

7-Day Forecast Updated 2:39 PM

Today

Mar 3

70° / 47°

10%

Wed

Mar 4

66° / 45°

70%

Thu

Mar 5

64° / 44°

30%

Fri

Mar 6

68° / 46°

10%

Sat

Mar 7

72° / 48°

Sun

Mar 8

70° / 47°

LOOKING AHEAD

Rain Expected Tomorrow — Hold Off Watering

NWS shows 70% chance of showers tomorrow with 0.6″ expected. Consider skipping today’s watering — your salsa garden plants will be fine until the rain arrives.

SoilStack looks ahead at tomorrow’s forecast. When rain is likely, we suggest holding off so you’re not over-watering right before a storm.

Keep Tasks Skip Watering

✓ 2 watering tasks skipped

Your weather. Already handled.

SoilStack watches for three specific patterns — a heat streak, a dry stretch, a cool spring — and adjusts your calendar before you notice. Watering tasks move forward. Transplant dates shift back. No alerts to dismiss. No manual updates. It just changes.

Transplant Texas Sweet Onions (spring)

Mar 20 Salsa Garden

Cool-season crop — can go out before last frost.

Space 4–6″ apart.

Protect from hard freezes with row cover if needed.

Why this date

Cool-season spring window opens Mar 20. Texas Sweet Onions tolerates light frost — can go out before last frost (Apr 5). Maturity: 110 days = Harvest before summer heat.

Every date comes with a receipt.

Tap any task: here's your last frost date, here's what this variety needs, here's the university source behind it. 249 named varieties, each with a documented research profile. If SoilStack schedules something, it can explain every word of it.

Overview Calendar My Garden Plants Recipes

‹ March 2026 ›

Month Week

SUN

MON

TUE

WED

THU

FRI

SAT

March 20

Transplant Texas Sweet Onions

Water All Containers

Planting Watering Feeding Harvest

Not every task is equal. SoilStack knows the difference.

Each task carries a consequence score — a plain signal of how much skipping it actually costs. Miss a transplant window and that score is high. Delay a feeding by two days and it's low. Pick Easy Going, Balanced, or All In and the calendar rebuilds around what actually matters for your effort level.

How It Works

From ZIP Code to Garden Plan in Minutes

Enter Your ZIP

We look up your USDA hardiness zone and calculate your local frost dates with 10%, 50%, and 90% probability windows.

Pick Your Plants

Choose from our research-backed library or start with a template. We'll show you what grows best in your zone.

Get Your Calendar

Receive a weather-aware calendar with explained dates, feeding schedules, and tasks that adapt to your effort level. Every recommendation tells you why.

Know exactly what to do in your garden.