When to plant in Linthicum, MD
USDA Zone 7bHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for Linthicum, Maryland — all computed from Linthicum's nearest NOAA weather station.
Zone 7b means many perennials and even some tender shrubs overwinter in Linthicum, while your frost dates still decide when annuals go out.
Frost probability
BALTIMORE WASH INTL AP · 1991–2020The date the last spring and first fall frost occur, by threshold and probability. A 90% date is later in spring — and earlier in fall — than a 10% date; the 50% · 32°F row is what most gardeners plan around. These are Linthicum’s own odds, recorded at BALTIMORE WASH INTL AP.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 12 | Apr 24 | Apr 9 | Oct 8 | Oct 21 | Nov 2 |
| 32°F | Apr 25 | Apr 10 | Mar 27 | Oct 17 | Oct 31 | Nov 12 |
| 28°F | Apr 10 | Mar 28 | Mar 13 | Oct 30 | Nov 10 | Nov 27 |
Download this table as CSV ↓ — every threshold and probability, plus this city’s planting-window dates.
What to plant now
TODAY · JULY 19Full-year planting calendar
Each bar is the exact window to take a planting action in Linthicum, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 16 km · complete 32°F normalsWhen stations disagree by more than a few days, that spread is real microclimate variation — elevation, water, urban heat. Judge which station best matches your own yard.
Linthicum planting FAQ
When is the last spring frost in Linthicum, MD?
Linthicum's average last spring frost falls near April 10 — the 50% mark at 32°F in the 1991–2020 normals. Hold tender transplants until the risk has passed, then plant out.
When is the first fall frost in Linthicum, MD?
Expect Linthicum's first fall frost near October 31 — a 50% chance of 32°F by that date. Bring in or cover tender crops ahead of it.
What hardiness zone is Linthicum in?
Linthicum is in USDA hardiness zone 7b. In zone 7b, winters are moderate — most common vegetables grow well in season.
How long is the growing season in Linthicum?
There are roughly 204 frost-free days in Linthicum (a moderate growing season), running from the average last frost around April 10 to the first fall frost near October 31.
When should I plant tomatoes in Linthicum?
In Linthicum, start tomato seeds indoors around February 13–February 27, then transplant seedlings outdoors around April 17 once the danger of frost has passed.
Never miss a window in Linthicum
An email when it’s time to start seeds, transplant, and sow — timed to Linthicum’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Ferndale · 4 km
- Brooklyn Park · 4 km
- Arbutus · 4 km
- Elkridge · 7 km
- Glen Burnie · 8 km
- Ilchester · 8 km
- Severn · 9 km
- Catonsville · 9 km
Frost dates recorded at BALTIMORE WASH INTL AP, 5 km from the city center · 1991–2020 NOAA climate normals · zone from the USDA/PRISM 2023 map. How we compute this.
BlissGarden. "When to Plant in Linthicum, MD — Frost Dates & Zone 7b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USW00093721. Retrieved from https://blissgarden.com/maryland/linthicum.