One of the best tools that you have as gardeners to help us estimate your gardening schedule is the USDA zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

You will be able to determine when it's a good idea to plant bells of ireland by looking at the USDA zone info for Forest Grove.

Planting Calendar for Bells of Ireland

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

You can plant bells of ireland just a tiny bit earlier in the year because they do ok in moderate cold.

The earliest that you can plant bells of ireland in Forest Grove 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 bells of ireland and expect a good harvest is probably August. You probably don't want to wait any later than that or else your bells of ireland may not have a chance to really do well. You can get started a couple of weeks earlier by starting your bells of ireland indoors.

Last Frost Date

On average the last frost is on March 15 in Forest Grove. In the coldest months of winter you can expect an average low temperature of 15°F.

Just be sure to remember that USDA zone info for Forest Grove is not always accurate and the actual date of last frost can change quite a bit from year to year. Half of the time in Forest Grove there is a last frost after March 15 so always be ready to cover your bells of ireland in the event of a late frost.

USDA Zone Info for Forest Grove

Here is the info for USDA Zone 8b.

Average Date of Last Frost (spring)	March 15
Average Date of First Frost (fall)	November 15
Lowest Expected Low	15°F
Highest Expected Low	20°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 20°F.

Plants to Grow in Forest Grove

You may be interested in your other planting guides for Forest Grove.