One of the best tools that you have as gardeners to help us estimate 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.

One way of making a decision about when it's a good idea to plant forget-me-not is to examine the USDA zone info for San Luis Obispo.

Planting Calendar for Forget-Me-Not

Frost tolerance for forget-me-not:	Tolerant of some frost.
When to plant:	Up to 5 weeks before last frost.

Since forget-me-not are moderately cold tolerant you can plant them a bit earlier in the year than plants that are more sensitive to the cold.

The earliest that you can plant forget-me-not in San Luis Obispo 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 forget-me-not and expect a good harvest is probably October. You probably don't want to wait any later than that or else your forget-me-not may not have a chance to really do well. If you are starting your forget-me-not 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 February 15 in San Luis Obispo. It might get as low as 25°F during the coldest months of winter.

Since the USDA zone info for San Luis Obispo is just an average the actual date of last frost changes from year to year. Half of the time in San Luis Obispo you get a frost after February 15 so make sure that you are prepared to protect your forget-me-not if you have a surprise late frost.

USDA Zone Info for San Luis Obispo

Here is the info for USDA Zone 9b.

Average Date of Last Frost (spring)	February 15
Average Date of First Frost (fall)	December 15
Lowest Expected Low	25°F
Highest Expected Low	30°F

This means that on a really cold year, the coldest it will get is 25°F. On most years you should be prepared to experience lows near 30°F.

Plants to Grow in San Luis Obispo

You may be interested in your other planting guides for San Luis Obispo.