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.

In Carlsbad you can determine when to plant iresene by looking at the USDA zone info.

Planting Calendar for Iresene

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

It's probably a bad idea to plant iresene until after all chance of frost has passed because they are not cold tolerant.

The earliest that you can plant iresene in Carlsbad is April. However, you really should wait until May if you don't want to take any chances.

The last month that you can plant iresene and expect a good harvest is probably August. Any later than that and your iresene may not have a chance to fully mature. You can get started a couple of weeks earlier by starting your iresene indoors.

Last Frost Date

The average date of last frost is March 15 in Carlsbad. In the coldest months of winter you can expect an average low temperature of 10°F.

Since the USDA zone info for Carlsbad is just an average the actual date of last frost can change quite a bit from year to year. Half of the time in Carlsbad you get surprised by a frost after March 15 so always be ready to cover your iresene in the event of a late frost.

USDA Zone Info for Carlsbad

Here is the info for USDA Zone 8a.

Average Date of Last Frost (spring)	March 15
Average Date of First Frost (fall)	November 15
Lowest Expected Low	10°F
Highest Expected Low	15°F

This means that on a really cold year, the coldest it will get is 10°F. On most years you should be prepared to experience lows near 15°F.

Plants to Grow in Carlsbad

You may be interested in your other planting guides for Carlsbad.