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 can estimate when to plant zinnia in Gilroy by checking out the USDA zone info.

Planting Calendar for Zinnia

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

You really shouldn't plant zinnia until after the last frost because they do not do well in cold weather.

The earliest that you can plant zinnia in Gilroy 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 zinnia and expect a good harvest is probably September. If you wait any later than that and your zinnia may not have a chance to really do well. If you are starting your zinnia indoors then you might be able to get away with starting them a little bit earlier.

Last Frost Date

The average date of last frost is February 15 in Gilroy. You can expect an average low temperature of 25°F in the coldest months of winter.

Since the USDA zone info for Gilroy may not be accurate from year to year the actual date of last frost can change quite a bit from year to year. Half of the time in Gilroy you get a frost after February 15 so always be ready to cover your zinnia if you have one of those late frosts.

USDA Zone Info for Gilroy

Here is the info for USDA Zone 9b.

Average Date of Last Frost (spring)	February 15
Average Date of First Frost (fall)	December 15
Lowest Expected Low	25°F
Highest Expected Low	30°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 30°F.

Plants to Grow in Gilroy

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