One of the best tools that you have as gardeners to help us determine your gardening schedule is the USDA zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

It's a good idea to estimate when it's a good idea to plant twinspur by checking out the USDA zone info for Glendora.

Planting Calendar for Twinspur

Frost tolerance for twinspur:	Tolerant of some frost.
When to plant:	Up to 5 weeks before last frost.

You can plant twinspur just a bit earlier in the year because they are one of those plants that can tolerate a little bit of cold weather.

The earliest that you can plant twinspur in Glendora is January. However, you really should wait until February if you don't want to take any chances.

The last month that you can plant twinspur and expect a good harvest is probably October. You probably don't want to wait any later than that or else your twinspur may not have a chance to fully mature. If you are starting your twinspur 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 January 31 in Glendora. You can expect an average low temperature of 30°F in the coldest months of winter.

Remember that USDA zone info for Glendora is just an average and the actual date of last frost changes from year to year. Since half of the time in Glendora there is a last frost after January 31 be ready to cover your twinspur in the event of one of those late frosts.

USDA Zone Info for Glendora

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 Glendora

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