Free
Begin here$0
A single signal for the season.
- 1 signal of your choice
- Email alerts
- ZIP-code weather
Weather-wise gardening
A little weather wisdom.
A flourishing garden.
BloomSignal watches your local forecast and sends an email when the weather lines up with a key gardening moment, from sowing to protecting tender plants.
The local layer
Rooted in your local weather.
- 01 Your ZIP sets the place.
- 02 Local forecasts shape the timing.
- 03 Email signals arrive when conditions match.
A simple rhythm
From forecast to garden bed.
Set your place, choose the moments you care about, and let the forecast do the checking.
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01
Sign in with Google
One-click sign-in, with no password to remember.
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02
Enter your ZIP code
We use it to pull local weather and frost data.
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03
Follow your signals
Get an email when forecast conditions for a signal appear to be met.
The field guide
Eleven moments worth watching.
Each signal turns a weather pattern into a clear gardening prompt.
01
Planting & sowing
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Cool-Season Direct Sowing
Estimated soil temperature has reached 45°F with no heavy snow forecast — ideal time to direct sow peas, carrots, and greens.
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Transplanting Warm-Season Crops
Last frost has passed and estimated soil temperature is at 65°F — a window to transplant tomatoes, peppers, and squash.
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Indoor Seed Starting
About 8 weeks from last spring frost — time to start selected crops indoors.
02
Bulb timing
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The Fall Bulb Window
Estimated soil temperature is below 55°F and first freeze is about 6 weeks away — ideal timing for fall bulb planting.
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Summer Bulb Planting
At least 2 weeks past spring frost with estimated soil temperature above 60°F — a window to plant summer bulbs.
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Fall Garlic Planting
First light frost has passed and deep freeze is not imminent — strong window to plant garlic.
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Late Tulip Planting Window
Forecast shows 4+ consecutive days with overnight lows at or above 30°F — ground is workable for late tulip bulbs.
03
Weather watch
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Heavy Rain Delay
More than 1 inch of rain forecast in the next 48 hours — hold off on outdoor work and planting.
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Unexpected Hard Freeze Alert
Temperature expected to drop below 32°F after a recent warm spell — cover or bring in tender plants.
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Heatwave Bolting Alert
Three or more consecutive days forecast above 80°F — cool-season crops may bolt.
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High Wind / Low Humidity Warning
Dry, windy conditions forecast in the next 48 hours — delay transplanting to avoid stress.
Choose your coverage
A season of signals.
Start with one signal for free, or keep the whole field guide close.
Gardener
All season$19.99 / year
All 11 signals, billed annually via Stripe.
- All 11 signals
- Email alerts
- ZIP-code weather