When to Plant Zinnia in Zone 1b

Before planting it is a good idea to find your USDA Zone info to figure out your garden schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

One way of determining when you can plant zinnia is to consult the USDA zone info for Zone 1b.


Planting Calendar for Zinnia

Frost tolerance for zinnia: Not tolerant of frost.
When to plant: After all chance of frost has passed.

Zinnia require warm weather which means that it's important to wait until it warms up after the last frost when the weather gets warmer before you can plant them.

JanFebMarAprMayJunJulAugSepOctNovDec
Legend 
A good time to plant zinnia
Possibly ok, but a risky time to plant zinnia
Probably not a good time to plant zinnia

The earliest that you can plant zinnia in Zone 1b is June. However, you really should wait until July if you don't want to take any chances.

The last month that you can plant zinnia and expect a good harvest is probably July. You probably don't want to wait any later than that or else your zinnia may not have a chance to really do well. You can get started a little bit earlier by starting your zinnia indoors.

Last Frost Date

On average all chance of frost has passed is on June 15 in Zone 1b. In the coldest months of winter you can expect an average low temperature of -55°F.

Remember that USDA zone info for Zone 1b is not always accurate and the actual date of last frost is different every year. Half of the time in Zone 1b last frost occurs after June 15 so always be ready to cover your zinnia in the event of a surprise late frost.

USDA Zone Info for Zone 1b

Here is the info for USDA Zone 1b.

Average Date of Last Frost (spring)June 15
Average Date of First Frost (fall)July 15
Lowest Expected Low-55°F
Highest Expected Low-50°F

This means that on a really cold year, the coldest it will get is -55°F. On most years you should be prepared to experience lows near -50°F.

Plants to Grow in Zone 1b

You may be interested in your other planting guides for Zone 1b.