The USDA Zone info is a great tool for gardeners to help us determine 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.

A way of making a decision about when it's the best time to plant streptocarpella is to check out the USDA zone info for Red Bluff.

Planting Calendar for Streptocarpella

Frost tolerance for streptocarpella:	Not tolerant of frost.
When to plant:	After the last frost.

Streptocarpella are not cold tolerant which tells us that you must wait until it warms up after all chance of frost has passed before you can plant them.

The earliest that you can plant streptocarpella in Red Bluff 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 streptocarpella and expect a good harvest is probably September. Any later than that and your streptocarpella may not have a chance to really do well. You can get started a couple of weeks earlier by starting your streptocarpella indoors.

Last Frost Date

On average all chance of frost has passed is on February 15 in Red Bluff. You can expect an average low temperature of 25°F in the coldest months of winter.

Since the USDA zone info for Red Bluff may not be accurate from year to year the actual date of last frost will vary from year to year. Since half of the time in Red Bluff there is a last frost after February 15 be ready to cover your streptocarpella if you have one of those late frosts.

USDA Zone Info for Red Bluff

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 Red Bluff

You may be interested in your other planting guides for Red Bluff.