Before planting it is a good idea to find your USDA Zone info to estimate your garden schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

In Redwood City you can figure out when it's a good idea to plant angel's trumpets by looking at the USDA zone info.

Planting Calendar for Angel's Trumpets

Frost tolerance for angel's trumpets:	Tolerant of a very small amount of frost.
When to plant:	Up to 3 weeks before last frost.

You can plant angel's trumpets a bit earlier in the year because they are barely cold tolerant.

The earliest that you can plant angel's trumpets in Redwood City is February. However, you really should wait until March if you don't want to take any chances.

The last month that you can plant angel's trumpets and expect a good harvest is probably September. If you wait any later than that and your angel's trumpets may not have a chance to really do well. You can get started a little bit earlier by starting your angel's trumpets indoors.

Last Frost Date

The average date of last frost is February 15 in Redwood City. You can expect an average low temperature of 25°F in the coldest months of winter.

Since the USDA zone info for Redwood City is just an average the actual date of last frost is different every year. Half of the time in Redwood City last frost occurs after February 15 so make sure that you are ready to protect your angel's trumpets in the event of a surprise late frost.

USDA Zone Info for Redwood City

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 Redwood City

You may be interested in your other planting guides for Redwood City.