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.

It's possible to determine when it's a good idea to plant candytuft by using the USDA zone info for Rock Island.

Planting Calendar for Candytuft

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

Since candytuft do well in moderate cold you can plant them just a bit earlier in the year than plants that are more sensitive to the cold.

The earliest that you can plant candytuft in Rock Island 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 candytuft and expect a good harvest is probably September. If you wait any later than that and your candytuft may not have a chance to fully mature. You can get started a little bit earlier by starting your candytuft indoors.

Last Frost Date

The average date of last frost is April 15 in Rock Island. You can expect an average low temperature of -15°F in the coldest months of winter.

Just be sure to remember that USDA zone info for Rock Island is just an average and the actual date of last frost is different every year. Since half of the time in Rock Island last frost occurs after April 15 be ready to cover your candytuft if you have a surprise late frost.

USDA Zone Info for Rock Island

Here is the info for USDA Zone 5b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-15°F
Highest Expected Low	-10°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 -10°F.

Plants to Grow in Rock Island

You may be interested in your other planting guides for Rock Island.