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.

You should be able to estimate when it's the best time to plant cosmos by using the USDA zone info for West Hollywood.

Planting Calendar for Cosmos

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

Cosmos do ok in moderate cold which means that you can start planting them slightly earlier than other frost tender plants.

The earliest that you can plant cosmos in West Hollywood 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 cosmos and expect a good harvest is probably September. You probably don't want to wait any later than that or else your cosmos may not have a chance to grow to maturity. If you are starting your cosmos indoors then you might be able to get away with starting them a little bit earlier.

Last Frost Date

On average the last frost when the weather gets warmer is on January 31 in West Hollywood. In the coldest months of winter you can expect an average low temperature of 35°F.

It's important to remember that the actual date of last frost is an average because it is based on the USDA zone info for West Hollywood and it can change quite a bit from year to year. Half of the time in West Hollywood there is a last frost after January 31 so make sure that you are prepared to cover your cosmos if you have one of those late frosts.

USDA Zone Info for West Hollywood

Here is the info for USDA Zone 10b.

Average Date of Last Frost (spring)	January 31
Average Date of First Frost (fall)	December 15
Lowest Expected Low	35°F
Highest Expected Low	40°F

This means that on a really cold year, the coldest it will get is 35°F. On most years you should be prepared to experience lows near 40°F.

Plants to Grow in West Hollywood

You may be interested in your other planting guides for West Hollywood.