Hub
Garden
Timing and planning tools for seed starting and fruit growing, built from real extension and grower guidance instead of rules of thumb.
A lot of garden timing questions don't have a single universal answer, they depend on your specific climate, soil, and what you're growing. Generic advice like "stratify for a few weeks" or "plant after your last frost" glosses over how much that actually varies. This hub is built around the questions where a real number, tied to your inputs, beats a rule of thumb: how many chill hours your winter is delivering, how long a specific seed type needs cold stratification, and how large a rain garden needs to be for your roof, soil, and regional rainfall.
Sources here range from state extension services to published stormwater sizing worksheets. Every tool links to what it's built on, and where a state's own published figures exist (like Wisconsin and Iowa's rain garden guidance), we use those directly rather than a generic regional estimate.
Seed cold stratification calculator
Find out how long to cold stratify your seeds and get an exact calendar date range to take them out of the fridge, based on seed type.
Verified formulaFruit tree chill hours calculator
Estimate winter chill hour accumulation for fruit trees from your own average winter temperatures, no zip code lookup or weather API required.
Verified formulaRain garden sizing calculator
Size a rain garden from your roof, driveway, and lawn drainage area, your soil type, and a state-level rainfall default for all 50 states, with the exact formula and sources shown.
Verified formulaHouseplant propagation timeline calculator
Estimate how long a pothos, philodendron, or monstera cutting takes to root in water or soil, based on plant type, method, and season.
Verified formulaOrchid repotting timeline calculator
Find out when to repot your Phalaenopsis, Cattleya, Oncidium, or Dendrobium, and get a bark-and-sphagnum mix ratio for your growing setup.
Verified formulaBare-root transplant shock recovery calculator
Estimate how long a newly transplanted tree or shrub needs to fully establish, based on trunk caliper or shrub size.
Verified formulaSeed viability (rag-doll test) calculator
Find out when to check leftover seeds for germination using the rag-doll test, with a first-check and final-count date based on seed type.
Verified formulaGrafting compatibility & timing calculator
Check whether a scion and rootstock genus are compatible for grafting, plus the scion collection window and callusing time for your graft type.
Verified formulaOnion & garlic curing time calculator
Estimate how long to cure garlic, onions, or shallots before storage, based on species and your curing space's humidity.
Verified formula