Before planting it is a good idea to find your USDA Zone info to estimate 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 determine when to plant poppies in Upland by checking out the USDA zone info.

Planting Calendar for Poppies

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

You can plant poppies just a bit earlier in the year because they do well in moderate cold.

The earliest that you can plant poppies 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 poppies and expect a good harvest is probably October. Any later than that and your poppies may not have a chance to grow to maturity. If you are starting your poppies indoors then you might be able to get away with starting them a little bit earlier.

Last Frost Date

In Upland the average date of last frost happens on January 31. It might get as low as 30°F during the coldest months of winter.

Always keep in mind that the actual date of last frost is not always accurate because it is based on the USDA zone info for Upland and it changes from year to year. Since half of the time in Upland last frost occurs after January 31 be ready to cover your poppies in the event of 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.