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When to Plant Angel's Trumpets in Altoona, WI

One of the best tools that you have as gardeners to help us estimate your gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

You should be able to determine when it's the best time to plant angel's trumpets by checking out the USDA zone info for Altoona.


Planting Calendar for Angel's Trumpets

Frost tolerance for angel's trumpets: Tolerant of a very small amount of frost.
When to plant: Up to 3 weeks before last frost.

Angel's Trumpets can survive in very little cold which means that you can plant them just a tiny bit earlier in the year than other frost tender plants.

JanFebMarAprMayJunJulAugSepOctNovDec
Legend 
A good time to plant angel's trumpets
Possibly ok, but a risky time to plant angel's trumpets
Probably not a good time to plant angel's trumpets

The earliest that you can plant angel's trumpets in Altoona is April. However, you really should wait until May if you don't want to take any chances.

The last month that you can plant angel's trumpets and expect a good harvest is probably August. If you wait any later than that and your angel's trumpets may not have a chance to fully mature. If you are starting your angel's trumpets indoors then you might be able to get away with starting them a little bit earlier.

Last Frost Date

On average the last frost has passed is on May 15 in Altoona. It might get as low as -25°F during the coldest months of winter.

Just be sure to remember that USDA zone info for Altoona may not be accurate from year to year and the actual date of last frost can change quite a bit from year to year. Half of the time in Altoona you get a frost after May 15 so always be ready to cover your angel's trumpets if you have one of those late frosts.

USDA Zone Info for Altoona

Here is the info for USDA Zone 4b.

Average Date of Last Frost (spring)May 15
Average Date of First Frost (fall)September 15
Lowest Expected Low-25°F
Highest Expected Low-20°F

This means that on a really cold year, the coldest it will get is -25°F. On most years you should be prepared to experience lows near -20°F.

Plants to Grow in Altoona

You may be interested in your other planting guides for Altoona.