The USDA Zone info is a great tool for gardeners to help us determine your gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

One way of getting a good idea when to plant lobelia is to consult the USDA zone info for Mason.

Planting Calendar for Lobelia

Frost tolerance for lobelia:	Very tolerant of frost.
When to plant:	Up to 7 weeks before last frost.

Lobelia do well in cold which tells us that you can get them planted much earlier than more sensitive plants.

The earliest that you can plant lobelia in Mason 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 lobelia and expect a good harvest is probably September. Any later than that and your lobelia may not have a chance to really do well. You can get started a few weeks earlier by starting your lobelia indoors.

Last Frost Date

On average the last frost has passed is on April 15 in Mason. It might get as low as -10°F during the coldest months of winter.

Remember that USDA zone info for Mason is not always accurate and the actual date of last frost will vary from year to year. Half of the time in Mason last frost occurs after April 15 so be sure to be ready to protect your lobelia in the event of a surprise late frost.

USDA Zone Info for Mason

Here is the info for USDA Zone 6a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-10°F
Highest Expected Low	-5°F

This means that on a really cold year, the coldest it will get is -10°F. On most years you should be prepared to experience lows near -5°F.

Plants to Grow in Mason

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