Cold Hardiness Zone Shipping & Planting Schedule
ATTENTION MONTANA RESIDENTS: DUE TO STATE LAWS, WE CANNOT SHIP PLANTS INTO YOUR STATE BETWEEN THE DATES OF JUNE 1st & SEPTEMBER 30th.
Sooner Plant Farm recommends planting within the date ranges listed below to avoid late spring and early fall freezes.
IMPORTANT:
If you select "Ship at the Best Time for My Zone" during checkout, we will follow the chart below based on your hardiness zone.
If you select the "Ship Now" option and the date is outside the recommended date ranges listed below, our guarantee will automatically be voided, and we will note your order and proceed with shipping per your request. Sooner Plant Farm is not responsible for any plant loss sustained when shipping outside of our recommended shipping date ranges.
OUR RECOMMENDED SHIPPING & PLANTING SCHEDULE
ZONE |
Temperature Range |
BEGIN SHIPPING DATE |
LAST SHIPPING DATE |
2a |
-50 to -55 degrees |
June 1st |
August 15th |
2b |
-40 to -45 degrees |
June 1st |
August 15th |
3a |
-40 to -35 degrees |
June 1st |
September 15th |
3b |
-35 to -30 degrees |
June 1st |
September 15th |
4a |
-30 to -25 degrees |
June 1st |
September 15th |
4b |
-25 to -20 degrees |
June 1st |
September 15th |
5a |
-20 to -15 degrees |
May 15th |
October 15th |
5b |
-15 to -10 degrees |
May 15th |
October 15th |
6a |
-10 to -5 degrees |
May 1st |
October 31st |
6b |
-5 to 0 degrees |
May 1st |
October 31st |
7a |
0 to 5 degrees |
April 15th |
October 31st |
7b |
5 to 10 degrees |
April 15th |
October 31st |
8a |
10 to 15 degrees |
March 15th |
November 15th |
8b |
15 to 20 degrees |
March 15th |
November 15th |
9a |
20 to 25 degrees |
February 15th |
December 15th |
9b |
25 to 30 degrees |
February 1st |
December 15th |
10a |
30 to 35 degrees |
February 1st |
December 15th |
10b |
35 to 40 degrees |
February 1st |
December 15th |
11a |
40 to 45 degrees |
February 1st | December 15th |
11b |
45 to 50 degrees |
February 1st | December 15th |
12a |
50 to 55 degrees |
February 1st | December 15th |
Note: Most plants do very well with fall planting, in fact it is a preferred planting time for many reasons. However, there are some species of plants that do not tolerate fall planting. Generally warm season growers like grasses and some perennials like Agastache and others prefer to be planted in spring when day light hours are increasing, and temperatures are getting warmer. If you have questions or concerns regarding when best to plant, please contact us.
Important: Cold hardiness ratings can be variable and are only a reference to gauge how likely a plant is to survive the normal average yearly climatic cold temperatures in your location or hardiness zone. If you live in a zone 6 location, and you receive temperatures colder than zone 6, there it is likely your zone 6 plants may not survive.
If you plan to grow your plants in a container or raised flower bed, those plants can be subjected to cold temperatures 2 zones colder than inground planting. For that reason we highly recommend referencing other reliable horticultural sources like Dave's Garden when making plant selections you may not be familiar with.