What to Plant in January in Zone 6
Here is what you can sow in January if you garden in USDA zone 6. Dates use typical zone 6 frosts, so your own microclimate may shift them by a week or two.
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| Crop | Window | Sow between |
|---|---|---|
| ParsnipHollow Crown | spring | Jan 26 – Mar 9 |
| LeekLincoln | spring | Jan 26 – Mar 9 |
| CeleriacPrinz | spring | Jan 12 – Feb 23 |
Zone 6 in January
January in Zone 6: Three Crops Ahead of the Colder Zones Next Door
The alliums and parsnip start earlier here than one zone north
Zone 6's milder winter buys real time at the seed-starting bench: leek, celeriac, and parsnip transplants can all start under lights this month, a full crop ahead of what a colder zone allows in January. Leek and celeriac both want 10 to 12 weeks of growth before transplant, so a January 1 start lines them up for a March or early April move outside. Leek can go once a soil thermometer clears 45 degrees at 2 inches, but celeriac ignores that thermometer entirely and answers to a stopwatch instead. Ten straight days on the bench below 55 degrees is the line that convinces a young plant winter already happened, and it spends the following spring throwing a seed stalk rather than thickening a root. A single chilly night by an open window will not do that damage; a run of cool days will, so keep the tray somewhere that holds a steady temperature.
Parsnip is worth starting even though it usually resents it
Direct sowing is the normal path for parsnip everywhere, since its long taproot forks badly if disturbed, but a January indoor start in deep 4-inch cells gives Zone 6 gardeners a 6-week jump on a notoriously slow germinator, one that can take 3 weeks to sprout even in ideal conditions. Use fresh seed only, since parsnip loses most of its viability within a year of packing, a fact that catches out anyone reaching for a leftover packet from two seasons back.
Do not let a warm week fool you into moving faster
Zone 6 sits in a band where a run of 55-degree days in January is common enough to tempt early outdoor sowing, and common enough to be followed by a hard freeze the same week. Treat any January warm spell as bonus time for indoor starts and bed prep, not as a green light to direct sow anything tender, since the soil 4 inches down stays far colder than the air feels and rarely tracks a short warm spell at all.
January in zone 6: common questions
What can I plant in January in zone 6?+
In January, USDA zone 6 gardeners can sow Parsnip, Leek, Celeriac. Dates use typical zone 6 frosts, so your own microclimate may shift them by a week or two.
What USDA hardiness zone am I in?+
Zone 6 is one band of the map, but planting time is set by your local frost dates, not the zone number. Enter your ZIP code in the free planner and it uses your actual frost dates, which can differ by weeks within a single zone.
Are these January planting dates exact?+
They are typical zone 6 windows. Two gardens in the same zone can be a week or two apart because of elevation and local climate, so treat these as a starting point and tune them to your ZIP code with the free planner.