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.

It's possible to determine when you can plant lenten rose by looking at the USDA zone info for Silvis.

Planting Calendar for Lenten Rose

Frost tolerance for lenten rose:	Tolerant of some frost.
When to plant:	Up to 5 weeks before last frost.

You can plant lenten rose just a bit earlier in the year because they are one of those plants that can tolerate a little bit of cold weather.

The earliest that you can plant lenten rose in Silvis 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 lenten rose and expect a good harvest is probably September. If you wait any later than that and your lenten rose may not have a chance to grow to maturity. Starting your lenten rose indoors is a great way to get them started a few weeks earlier.

Last Frost Date

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

It's important to remember that the actual date of last frost is not always accurate because it is based on the USDA zone info for Silvis and it can change quite a bit from year to year. Since half of the time in Silvis it frosts late in the year after April 15 be ready to protect your lenten rose in the event of one of those late frosts.

USDA Zone Info for Silvis

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 Silvis

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