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.

You should be able to estimate when it's possible to plant schizanthus by reviewing the USDA zone info for Holbrook.

Planting Calendar for Schizanthus

Frost tolerance for schizanthus:	Not tolerant of frost.
When to plant:	After the last frost when the weather gets warmer.

Schizanthus do not do well in cold weather which tells us that you must wait until it warms up after the last frost before you can plant them.

The earliest that you can plant schizanthus in Holbrook is April. However, you really should wait until May if you don't want to take any chances.

The last month that you can plant schizanthus and expect a good harvest is probably August. You probably don't want to wait any later than that or else your schizanthus may not have a chance to grow to maturity. Starting your schizanthus indoors is a great way to get them started a few weeks earlier.

Last Frost Date

The average date of last frost is April 15 in Holbrook. In the coldest months of winter you should expect an average low temperature of 0°F.

Keep in mind that USDA zone info for Holbrook may not be accurate from year to year and the actual date of last frost will vary from year to year. Half of the time in Holbrook there is a last frost after April 15 so make sure that you are ready to protect your schizanthus in the event of a late frost.

USDA Zone Info for Holbrook

Here is the info for USDA Zone 7a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	0°F
Highest Expected Low	5°F

This means that on a really cold year, the coldest it will get is 0°F. On most years you should be prepared to experience lows near 5°F.

Plants to Grow in Holbrook

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