One of the best tools that you have as gardeners to help us figure out 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.

The USDA zone info for Melbourne can be used to figure out when you can plant blue throatwort.

Planting Calendar for Blue Throatwort

Frost tolerance for blue throatwort:	Not tolerant of frost.
When to plant:	After the last frost has passed.

Since blue throatwort are not cold tolerant you really should wait until after the last frost when the weather gets warmer before you can plant them.

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

Last Frost Date

On average the last frost when the weather gets warmer is on February 15 in Melbourne. In the coldest months of winter you should expect an average low temperature of 25°F.

Since the USDA zone info for Melbourne may not be accurate from year to year the actual date of last frost will vary from year to year. Since half of the time in Melbourne you get surprised by a frost after February 15 be ready to cover your blue throatwort if you have one of those late frosts.

USDA Zone Info for Melbourne

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 Melbourne

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