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.

You can determine when it's the best time to plant pearl onions in Isle of Palms by looking at the USDA zone info.

Planting Calendar for Pearl onions

Frost tolerance for pearl onions:	Tolerant of a very small amount of frost.
When to plant:	Up to 3 weeks before last frost.

Pearl onions tend to make it in very little cold which tells us that you can plant them slightly earlier in the year than more sensitive plants.

The earliest that you can plant pearl onions in Isle of Palms 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 pearl onions and expect a good harvest is probably August. If you wait any later than that and your pearl onions may not have a chance to really do well. Starting your pearl onions indoors is a great way to get them started a few weeks earlier.

Last Frost Date

On average the last frost has passed is on March 15 in Isle of Palms. In the coldest months of winter you can expect an average low temperature of 15°F.

Just be sure to remember that USDA zone info for Isle of Palms is an average and the actual date of last frost changes from year to year. Half of the time in Isle of Palms you get surprised by a frost after March 15 so make sure that you are ready to protect your pearl onions in the event of one of those late frosts.

USDA Zone Info for Isle of Palms

Here is the info for USDA Zone 8b.

Average Date of Last Frost (spring)	March 15
Average Date of First Frost (fall)	November 15
Lowest Expected Low	15°F
Highest Expected Low	20°F

This means that on a really cold year, the coldest it will get is 15°F. On most years you should be prepared to experience lows near 20°F.

Plants to Grow in Isle of Palms

You may be interested in your other planting guides for Isle of Palms.