One of the first steps you take when you are determining your gardening schedule is find your 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 Marquette can be read to figure out when it's possible to plant sweet sultan.

Planting Calendar for Sweet Sultan

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

Sweet Sultan tend to make it in a tiny bit of cold which tells us that you can plant them slightly earlier in the year than other frost tender plants.

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

Last Frost Date

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

Keep in mind that USDA zone info for Marquette is an average and the actual date of last frost can change quite a bit from year to year. Since half of the time in Marquette last frost occurs after April 15 be ready to protect your sweet sultan if you have a late frost.

USDA Zone Info for Marquette

Here is the info for USDA Zone 5b.

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

This means that on a really cold year, the coldest it will get is -15°F. On most years you should be prepared to experience lows near -10°F.

Plants to Grow in Marquette

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