Practical planning tools for short growing seasons.
Climate-aware garden planning for cold and short-season climates
Practical planning tools that use frost dates and growing degree days to help you decide what can mature, when to start seeds, and whether you still have time to plant.
Built for gardeners where short seasons, cool summers, and early fall frost can change what is realistically possible.
Each tool answers a different planning question, whether you’re starting seeds, checking frost dates, or seeing if a crop can still finish before fall.
The main garden planning tool for checking what can realistically mature in your season.
Use it to compare crop heat requirements against your local growing season so you can tell whether a variety is realistically finishable before frost.
Find the right indoor seed-starting dates based on your local last frost date.
Use it when you want a practical spring planting schedule instead of guessing from a generic calendar.
Check whether you still have time to plant a crop before your season runs out.
Work backward from your first fall frost to estimate the latest safer planting window for fast crops and succession planting.
Look up the frost boundaries that shape your local growing season.
Use it to find your typical last spring frost and first fall frost — the basic planning anchors behind the rest of the site.
Most gardening advice assumes a longer, more forgiving season than many gardeners actually have.
GrowByDate is built around two measurable constraints: frost timing and heat accumulation. Frost tells you when your season usually begins and ends. Growing degree days (GDD) help estimate whether a crop has enough accumulated warmth to mature inside that window.
This matters most in short-season climates, where “days to maturity” on its own can be misleading. A crop may fit on paper, but still struggle if the season does not deliver enough heat.
The goal is not perfect prediction. It is building a plan with better odds — one that matches your actual season instead of a generic average.