The USDA Zone info is a great tool for gardeners to help us estimate 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.

The USDA zone info for Boulder can be used to determine when to plant bloodleaf.

Planting Calendar for Bloodleaf

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

Since bloodleaf do not do well in cold weather you must wait until after all chance of frost has passed before you can plant them.

The earliest that you can plant bloodleaf in Boulder 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 bloodleaf and expect a good harvest is probably August. Any later than that and your bloodleaf may not have a chance to really do well. If you are starting your bloodleaf indoors then you might be able to get away with starting them a little bit earlier.

Last Frost Date

In Boulder the average date of last frost happens on April 15. It might get as low as -15°F during the coldest months of winter.

Just be sure to remember that the actual date of last frost is an average because it is based on the USDA zone info for Boulder and it will vary from year to year. Since half of the time in Boulder there is a last frost after April 15 be ready to protect your bloodleaf in the event of a surprise late frost.

USDA Zone Info for Boulder

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 Boulder

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