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

In Upland you can estimate when it's possible to plant leeks by checking out the USDA zone info.

Planting Calendar for Leeks

Frost tolerance for leeks:	Very tolerant of frost.
When to plant:	Up to 7 weeks before last frost.

Leeks do well in cold weather which tells us that you can plant them a lot earlier in the year than more sensitive plants.

The earliest that you can plant leeks in Upland 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 leeks and expect a good harvest is probably October. You probably don't want to wait any later than that or else your leeks may not have a chance to fully mature. You can get started a little bit earlier by starting your leeks indoors.

Last Frost Date

The average date of last frost is January 31 in Upland. It might get as low as 30°F during the coldest months of winter.

Always keep in mind that USDA zone info for Upland is just an average and the actual date of last frost can change quite a bit from year to year. Since half of the time in Upland you get a frost after January 31 be ready to cover your leeks if you have one of those late frosts.

USDA Zone Info for Upland

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 Upland

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