Before planting it is a good idea to find your USDA Zone info to figure out your garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

The USDA zone info for Warrenton should be read to determine when to plant saxifraga.

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.

Saxifraga do ok in moderate cold which means that you can get them planted just a bit earlier than more sensitive plants.

The earliest that you can plant saxifraga in Warrenton 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 saxifraga and expect a good harvest is probably September. If you wait any later than that and your saxifraga may not have a chance to really do well. You can get started a couple of weeks earlier by starting your saxifraga indoors.

Last Frost Date

On average the last frost has passed is on February 15 in Warrenton. It might get as low as 20°F during the coldest months of winter.

Since the USDA zone info for Warrenton may not be accurate from year to year the actual date of last frost can change quite a bit from year to year. Half of the time in Warrenton there is a last frost after February 15 so always be ready to protect your saxifraga in the event of a surprise late frost.

USDA Zone Info for Warrenton

Here is the info for USDA Zone 9a.

Average Date of Last Frost (spring)	February 15
Average Date of First Frost (fall)	December 15
Lowest Expected Low	20°F
Highest Expected Low	25°F

This means that on a really cold year, the coldest it will get is 20°F. On most years you should be prepared to experience lows near 25°F.

Plants to Grow in Warrenton

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