PlantDates
PlantDates is a set of free garden calculators for US gardeners — frost dates by ZIP, planting calendars by zone, plus bed, soil and spacing math. Frost dates come from 1991–2020 climate normals at 6,183 locations, and it says plainly that a median date is a coin flip — half of years frost later.
Why it earned its spot
A warm paper-white ground and a single deep green accent do all the work here: no hero image, just a heavy headline with the word “free” set in green as the only color in the upper page. The thirteen tools sit in a plain three-column card grid, each with a small glyph, a bold name and one line of description — enough to choose from without opening anything. Below that, small-caps eyebrow labels break crops, months and states into rows of pill links, so a large index stays scannable, and the one dark block on the page is the email box, which is also the only thing asking for anything.
The colors
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</a>Other spots in Home & garden
LawnDates tells US homeowners when to overseed, aerate, fertilize and put down pre-emergent for their own ZIP. Each city calendar names the actual NOAA station its dates come from and how far away it sits, then calls every window a starting point rather than a deadline.