Frost Dates for Denton, MD 21629
Last spring frost April 8 · First fall frost October 30 · 205 frost-free days · USDA Zone 7b
Frost probability for 21629
| Frost | 10% | 50% | 90% |
|---|---|---|---|
| Spring (last frost) | April 23 | April 8 | March 24 |
| Fall (first frost) | October 12 | October 30 | November 17 |
Dates come from NOAA 1971–2000 freeze probabilities at the nearest reporting station (41.5 km away); the 50% date is the median year.
Month by month in Denton
| Month | What to do |
|---|---|
| January | Plan your garden layout and order seeds. Research varieties suited to your frost dates. |
| February | Start peppers and eggplant indoors 8–10 weeks before your last frost (around April 8). Start tomatoes about two weeks later, 6–8 weeks before last frost. |
| March | Start herbs, basil, and squash indoors (4–6 weeks before frost). Direct sow peas, spinach, and lettuce if soil is workable. |
| April | Last frost around April 8. Transplant cold-hardy crops (broccoli, kale, cabbage). Harden off tomato and pepper seedlings. |
| May | Frost has passed. Transplant tomatoes, peppers, and basil outdoors. Direct sow beans, cucumbers, squash, and zucchini. |
| June | Succession plant lettuce and greens. Keep beds weeded and watered consistently. |
| July | Harvest regularly to encourage production. Monitor for pests and disease. |
| August | Midsummer: harvest beans, zucchini, cucumbers. Start brassica seeds indoors for fall. |
| September | First fall frost approaching (around October 30). Transplant fall brassicas. Sow spinach, arugula, and radishes. |
| October | First frost around October 30. Harvest tomatoes and peppers before frost. Cover cold-hardy crops with row covers to extend the season. |
| November | Harvest remaining cold-hardy crops: kale, carrots, and beets. Plant garlic bulbs for next year. |
| December | Clean up spent plants. Add compost to beds. Rest, review, and plan next year's garden. |
What grows in a 205-day season
Frequently Asked Questions
What is the last frost date for Denton, MD (ZIP 21629)?
The median last spring frost date for Denton, MD (ZIP code 21629) is around April 8. This is the 50th-percentile date — meaning half of all years see frost end before this date. Use the 10% and 90% dates to understand the full range of risk in your area.
What is the first fall frost date in Denton, MD?
The median first fall frost date for Denton, MD is around October 30. Plan to harvest or protect frost-sensitive crops like tomatoes and peppers at least a week before this date to avoid losses.
How long is the growing season in Denton, MD?
The frost-free growing season in Denton is about 205 days. This window — from your last spring frost to your first fall frost — is when warm-season vegetables thrive. Cold-hardy crops like kale, spinach, and peas can extend your season by weeks on either side.
What USDA hardiness zone is Denton, MD?
Based on frost date patterns, Denton falls approximately in 7b. USDA hardiness zones are determined by average annual minimum winter temperatures and guide both plant selection and planting timing for your location.
When should I start tomatoes indoors in Denton, MD?
Start tomato seeds indoors 6–8 weeks before your last frost date (around April 8). For Denton, that's roughly February 12 to February 26. Transplant outdoors 1–2 weeks after your last frost.
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