One of the first steps you take when you are estimating 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.

A way of estimating when it's a good idea to plant saxifraga is to check out the USDA zone info for Kingston.

Planting Calendar for Saxifraga

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

You can plant saxifraga a bit earlier in the year because they do ok in moderate cold.

The earliest that you can plant saxifraga in Kingston 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 saxifraga and expect a good harvest is probably August. Any later than that and your saxifraga may not have a chance to grow to maturity. If you are starting your saxifraga indoors then you might be able to get away with starting them a few weeks earlier.

Last Frost Date

On average the last frost has passed is on April 15 in Kingston. It might get as low as -15°F during the coldest months of winter.

Keep in mind that USDA zone info for Kingston is not always accurate and the actual date of last frost changes from year to year. Half of the time in Kingston there is a last frost after April 15 so make sure that you are ready to protect your saxifraga if you have a late frost.

USDA Zone Info for Kingston

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 Kingston

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