Before planting it is a good idea to find your USDA Zone info to determine your garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

In North Las Vegas you can figure out when it's the best time to plant sunflowers by using the USDA zone info.

Planting Calendar for Sunflowers

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

Sunflowers are not cold tolerant which means that you need to wait until it warms up after the last frost when the weather gets warmer before you can plant them.

The earliest that you can plant sunflowers in North Las Vegas 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 sunflowers and expect a good harvest is probably September. Any later than that and your sunflowers may not have a chance to fully mature. If you are starting your sunflowers indoors then you might be able to get away with starting them a few weeks earlier.

Last Frost Date

In North Las Vegas the average date of last frost happens on February 15. You can expect an average low temperature of 20°F in the coldest months of winter.

Just be sure to remember that USDA zone info for North Las Vegas is not always accurate and the actual date of last frost is different every year. Half of the time in North Las Vegas last frost occurs after February 15 so be sure to be ready to protect your sunflowers in the event of a late frost.

USDA Zone Info for North Las Vegas

Here is the info for USDA Zone 9a.

Average Date of Last Frost (spring)	February 15
Average Date of First Frost (fall)	December 15
Lowest Expected Low	20°F
Highest Expected Low	25°F

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

Plants to Grow in North Las Vegas

You may be interested in your other planting guides for North Las Vegas.