Harvest Date Calculator
Plant date and crop type to expected harvest window.
This tool is for informational and educational purposes only. It is not a substitute for professional financial, medical, legal, or engineering advice. See Terms of Service.
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Request a ToolHow to Use the Harvest Date Calculator
Knowing when your vegetables will be ready helps you plan successions, stagger planting, and avoid a glut of produce ripening all at once. Here is how to get an accurate estimate:
- Enter your planting date. Use the actual date you transplanted seedlings or direct-sowed seeds into the ground. For transplants, use the transplant date, not the date you started seeds indoors.
- Select your crop. The calculator uses the midpoint of each crop's documented days-to-maturity range. It also shows you the full harvest window so you know the earliest and latest realistic dates.
- Use a custom crop. If your variety has a different days-to-maturity listed on the seed packet, select "Custom Crop" and enter that number directly. Seed packet data is always more accurate than generic averages for a specific variety.
- Read your results. The primary result is the expected harvest date using the midpoint of the range. The breakdown also shows the earliest and latest dates based on the documented range.
Use the Share button to send your planting schedule to a fellow gardener, or Copy to save the harvest date to your planting notes.
About the Harvest Date Calculator
Days to maturity is measured differently depending on the crop. For direct-seeded crops like carrots, radishes, and beans, the clock starts when the seed is planted. For transplants like tomatoes and peppers, the days-to-maturity on the seed packet typically starts from transplanting, not from seed germination. Always check your seed packet for clarification.
Growing conditions significantly affect actual harvest dates. Cooler temperatures slow growth; warmth and long days accelerate it. Plants in ideal conditions (consistent moisture, fertile soil, full sun) will often reach the early end of the range. Plants stressed by heat, drought, or poor soil may exceed the late estimate. Use this calculator for planning purposes, then watch your plants for actual readiness cues like color, firmness, and size.
Frequently Asked Questions
How do I know when my tomatoes are ready to harvest?
Tomatoes are ready when they reach their full color (red, orange, yellow, or purple depending on the variety) and give slightly when gently squeezed. The fruit should separate easily from the vine with a gentle twist. Do not wait for fully soft fruit on the vine; a little firmness when harvested is fine, and tomatoes will continue ripening at room temperature. Avoid refrigerating tomatoes as cold temperatures destroy flavor and texture.
When does "days to maturity" start for tomatoes and peppers?
For tomatoes, peppers, and other transplanted crops, days to maturity on the seed packet is typically counted from the date of transplanting outdoors, not from when you started seeds indoors. If you started tomato seeds indoors 6-8 weeks before transplanting and the packet says "75 days," your total time from seed to harvest is roughly 13-15 weeks. Use your transplant date in this calculator for the most accurate result.
How long do carrots take to grow from seed?
Most carrot varieties take 70-80 days from direct sowing to harvest. Smaller "baby" varieties like Thumbelina or Little Finger can be ready in 55-65 days, while large storage varieties like Danvers 126 or Autumn King may take 75-80 days or longer. Carrots are ready when the shoulder is at least half an inch in diameter at the soil surface. Pull a test carrot to check size before harvesting the whole row.
Why do seed packets give a range instead of a single number for days to maturity?
Days to maturity varies based on growing conditions including temperature, sunlight hours, soil fertility, moisture levels, and climate zone. A tomato planted in a warm Southern garden will mature faster than the same variety grown in a cool Northern climate. The range on the packet reflects this variability across different growing conditions. In ideal conditions you will usually see results at the early end; in marginal conditions, expect the late end or beyond.