Tools
Each tool reads the same fields as the variety pages, so a figure here never disagrees with the record it came from.
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When to start seeds indoors: planting calculator
Enter your last frost date and get sowing, transplanting and first-harvest dates for every tomato and pepper variety in the catalog, computed from each record's own figures.
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How long tomatoes and peppers take to grow: days to maturity
Every tomato and pepper variety in the catalog sorted by days to maturity, from the earliest harvest to the latest, with the basis each figure is counted from.
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Last frost dates by ZIP code and state
Look up the average last spring frost date for your ZIP code or the weather station nearest you, from NOAA's 1991–2020 climate normals, with a safe date for tender seedlings.
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First frost dates by ZIP code and state
Look up the average first fall frost date for your ZIP code or the weather station nearest you, from NOAA's 1991–2020 climate normals, with the length of your frost-free season.
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Companion planting chart, with the evidence for each pair
Which vegetables to grow together and which to keep apart, for 16 common crops, with the reason and a university source for every entry, and which pairings were never tested.