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.

The USDA zone info for Half Moon Bay should be reffered to in order to estimate when to plant primroses.

Planting Calendar for Primroses

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

Primroses do well in pretty solid cold which means that you can plant them much earlier in the year than more sensitive plants.

The earliest that you can plant primroses in Half Moon Bay 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 primroses and expect a good harvest is probably October. You probably don't want to wait any later than that or else your primroses may not have a chance to really do well. If you are starting your primroses indoors then you might be able to get away with starting them a couple of weeks earlier.

Last Frost Date

The average date of last frost is January 31 in Half Moon Bay. You can expect an average low temperature of 30°F in the coldest months of winter.

Keep in mind that the actual date of last frost is not always accurate because it is based on the USDA zone info for Half Moon Bay and it changes from year to year. Since half of the time in Half Moon Bay you get surprised by a frost after January 31 be ready to protect your primroses if you have one of those late frosts.

USDA Zone Info for Half Moon Bay

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 Half Moon Bay

You may be interested in your other planting guides for Half Moon Bay.