Silver Spring, MD · zone 7b · ~209 frost-free days
When to plant a garden in Silver Spring.
In Silver Spring, the typical last spring frost lands around Apr 7 and the first fall frost around Nov 2, giving you about 209 frost-free days. Cool-season crops go out before the last frost; warm-season crops wait until after it.
The 2026 windows
Sow dates for Silver Spring, keyed to your frost.
| Crop | Start indoors | Spring sow / set out | Fall sow |
|---|---|---|---|
| Tomato, slicing | Mar 3 to May 3 | Apr 14 to Jun 14 | — |
| Lettuce, leaf | — | Feb 28 to Apr 14 | Aug 19 to Oct 18 |
| Carrot | — | Feb 28 to Apr 2 | Aug 7 to Sep 2 |
| Bush Bean | — | Apr 7 to May 28 | Jul 19 to Aug 21 |
| Cucumber, slicing | — | Apr 14 to Jul 14 | Jul 2 to Aug 2 |
| Pepper, bell | Mar 12 to May 3 | Apr 23 to Jun 14 | — |
| Kale | Jan 17 to Feb 14 | Feb 28 to Mar 28 | Aug 2 to Sep 17 |
| Spinach | — | Feb 14 to Mar 28 | Aug 19 to Oct 7 |
Silver Spring sits in Zone 7b, but two gardens in the same city can be a week or two apart. The planner works from your ZIP code's frost dates, not the zone, so the dates land right for your block, not the metro average.
Build your Silver Spring garden plan.
Tell the free planner what you want to eat and who you're feeding. It returns plant counts, spacing, and frost-safe sow dates for ZIP 20910 in about 60 seconds.