One of the first steps you take when you are figuring out your gardening schedule is find your 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.

A common way of estimating when to plant daylily is to examine the USDA zone info for Rio Vista.

Planting Calendar for Daylily

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

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

The earliest that you can plant daylily in Rio Vista 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 daylily and expect a good harvest is probably October. You probably don't want to wait any later than that or else your daylily may not have a chance to grow to maturity. If you are starting your daylily indoors then you might be able to get away with starting them a few weeks earlier.

Last Frost Date

On average all chance of frost has passed is on February 15 in Rio Vista. In the coldest months of winter you can expect an average low temperature of 25°F.

Remember that the actual date of last frost is just an average because it is based on the USDA zone info for Rio Vista and it will vary from year to year. Half of the time in Rio Vista you get a frost after February 15 so just be sure to be ready to cover your daylily in the event of a surprise late frost.

USDA Zone Info for Rio Vista

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 Rio Vista

You may be interested in your other planting guides for Rio Vista.