When to Plant Angelonia in Hamilton, MT

One of the first steps you take when you are getting a good idea your gardening schedule is find your USDA Zone info. 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 it's the best time to plant angelonia is to look at the USDA zone info for Hamilton.


Planting Calendar for Angelonia

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

Angelonia can survive in some cold which tells us that you can plant them a bit earlier in the year than other frost tender plants.

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

The earliest that you can plant angelonia in Hamilton is March. However, you really should wait until April if you don't want to take any chances.

The last month that you can plant angelonia and expect a good harvest is probably August. Any later than that and your angelonia may not have a chance to fully mature. Starting your angelonia indoors is a great way to get them started a couple of weeks earlier.

Last Frost Date

The average date of last frost is April 15 in Hamilton. In the coldest months of winter you can expect an average low temperature of -15°F.

It's important to remember that USDA zone info for Hamilton may not be accurate from year to year and the actual date of last frost will vary from year to year. Half of the time in Hamilton you get a frost after April 15 so make sure that you are prepared to cover your angelonia if you have a surprise late frost.

USDA Zone Info for Hamilton

Here is the info for USDA Zone 5b.

Average Date of Last Frost (spring)April 15
Average Date of First Frost (fall)October 15
Lowest Expected Low-15°F
Highest Expected Low-10°F

This means that on a really cold year, the coldest it will get is -15°F. On most years you should be prepared to experience lows near -10°F.

Plants to Grow in Hamilton

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