One of the best tools that you have as gardeners to help us estimate your gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

By using the USDA zone info for Phoenix you will be able to determine when it's a good idea to plant dill.

Planting Calendar for Dill

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

Since dill are one of those plants that can tolerate a tiny bit of cold weather you can plant them a bit earlier in the year than other frost tender plants.

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

Last Frost Date

On average the last frost is on February 15 in Phoenix. It might get as low as 25°F during the coldest months of winter.

Just be sure to remember that USDA zone info for Phoenix is just an average and the actual date of last frost changes from year to year. Since half of the time in Phoenix you get surprised by a frost after February 15 be ready to protect your dill in the event of a surprise late frost.

USDA Zone Info for Phoenix

Here is the info for USDA Zone 9b.

Average Date of Last Frost (spring)	February 15
Average Date of First Frost (fall)	December 15
Lowest Expected Low	25°F
Highest Expected Low	30°F

This means that on a really cold year, the coldest it will get is 25°F. On most years you should be prepared to experience lows near 30°F.

Plants to Grow in Phoenix

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