When to plant basil in Grand Rapids
Basil is frost-tender, so every date keys off Grand Rapids's last spring frost of Apr 30.
Step 1 · Sow
Start seeds indoors
Apr 11 – May 2
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Jun 2 – Jun 23
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Aug 1 – Aug 31
Picking runs until conditions turn against the crop.
Window
Days to maturity
60 – 90 d
Grand Rapids's 166-day season leaves this much room.
Basil on Grand Rapids's growing year
Frost-bounded season with crops mapped onto the 12-month axis.
Frost risk Growing Harvest
JAN
FEB
MAR
APR
MAY
JUN
JUL
AUG
SEP
OCT
NOV
DEC
FROST
FROST
APR 30
OCT 16
Common questions
When can I sow basil outdoors in Grand Rapids?
Direct-sow around early June (Jun 2–Jun 23) in Grand Rapids, based on its local frost dates. Confidence 84%.
When will basil be ready to harvest in Grand Rapids?
Expect to harvest from around early August (Aug 1–Aug 31) in Grand Rapids, based on its local frost dates. Confidence 78%.
When should I start basil seeds indoors in Grand Rapids?
Start seeds indoors around mid April (Apr 11–May 2) in Grand Rapids, based on its local frost dates. Confidence 83%.
When can I transplant basil outdoors in Grand Rapids?
Transplant outdoors around early June (Jun 2–Jun 23) in Grand Rapids, based on its local frost dates. Confidence 84%.
How long is the growing season in Grand Rapids?
Grand Rapids has roughly 166 frost-free days, which is enough time to grow basil to maturity outdoors.
The rule of thumb
Sow basil 6–8 weeks before your last spring frost; plant out 2–3 weeks after it. Every date on this page is derived from that rule and Grand Rapids's frost dates.
Confidence 87/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.