The USDA Zone info is a great tool for gardeners to help us figure out your gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

One way of getting a good idea when it's the best time to plant california poppy is to look at the USDA zone info for Gladstone.

Planting Calendar for California Poppy

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

California Poppy do ok in moderate cold which means that you can plant them slightly earlier than other plants that might not handle the cold.

The earliest that you can plant california poppy in Gladstone 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 california poppy and expect a good harvest is probably August. You probably don't want to wait any later than that or else your california poppy may not have a chance to grow to maturity. Starting your california poppy indoors is a great way to get them started a little bit earlier.

Last Frost Date

The average date of last frost is April 15 in Gladstone. It might get as low as -20°F during the coldest months of winter.

Remember that USDA zone info for Gladstone may not be accurate from year to year and the actual date of last frost can change quite a bit from year to year. Since half of the time in Gladstone you get a frost after April 15 be ready to protect your california poppy if you have a late frost.

USDA Zone Info for Gladstone

Here is the info for USDA Zone 5a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-20°F
Highest Expected Low	-15°F

This means that on a really cold year, the coldest it will get is -20°F. On most years you should be prepared to experience lows near -15°F.

Plants to Grow in Gladstone

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