When to Plant Salpiglossis in Zone 1a

One of the first steps you take when you are figuring out your gardening schedule is find your USDA Zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

One way of figuring out when you can plant salpiglossis is to examine the USDA zone info for Zone 1a.


Planting Calendar for Salpiglossis

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

It's a bad idea to plant salpiglossis until after the last frost when the weather gets warmer because they do not do well in cold weather.

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

The earliest that you can plant salpiglossis in Zone 1a 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 salpiglossis and expect a good harvest is probably July. You probably don't want to wait any later than that or else your salpiglossis may not have a chance to grow to maturity. You can get started a couple of weeks earlier by starting your salpiglossis indoors.

Last Frost Date

The average date of last frost is June 15 in Zone 1a. In the coldest months of winter you can expect an average low temperature of -60°F.

Keep in mind that USDA zone info for Zone 1a is just an average and the actual date of last frost will vary from year to year. Since half of the time in Zone 1a last frost occurs after June 15 be ready to cover your salpiglossis if you have a late frost.

USDA Zone Info for Zone 1a

Here is the info for USDA Zone 1a.

Average Date of Last Frost (spring)June 15
Average Date of First Frost (fall)July 15
Lowest Expected Low-60°F
Highest Expected Low-55°F

This means that on a really cold year, the coldest it will get is -60°F. On most years you should be prepared to experience lows near -55°F.

Plants to Grow in Zone 1a

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