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

The earliest that you can plant bidens in Lake Havasu City should be figured out by reviewing the USDA zone info.

Planting Calendar for Bidens

Frost tolerance for bidens:	Not tolerant of frost.
When to plant:	After the last frost.

You really shouldn't plant bidens until after the last frost when the weather gets warmer because they are not cold tolerant.

The earliest that you can plant bidens in Lake Havasu City is February. However, you really should wait until March if you don't want to take any chances.

The last month that you can plant bidens and expect a good harvest is probably September. If you wait any later than that and your bidens may not have a chance to grow to maturity. If you are starting your bidens indoors then you might be able to get away with starting them a little bit earlier.

Last Frost Date

On average the last frost is on January 31 in Lake Havasu City. It might get as low as 30°F during the coldest months of winter.

It's important to remember that USDA zone info for Lake Havasu City may not be accurate from year to year and the actual date of last frost will vary from year to year. Since half of the time in Lake Havasu City you get a frost after January 31 be ready to cover your bidens if you have a surprise late frost.

USDA Zone Info for Lake Havasu City

Here is the info for USDA Zone 10a.

Average Date of Last Frost (spring)	January 31
Average Date of First Frost (fall)	December 15
Lowest Expected Low	30°F
Highest Expected Low	35°F

This means that on a really cold year, the coldest it will get is 30°F. On most years you should be prepared to experience lows near 35°F.

Plants to Grow in Lake Havasu City

You may be interested in your other planting guides for Lake Havasu City.