When to Plant Anchusa in Allentown, PA

One of the first steps you take when you are estimating 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 Allentown can be used to determine when it's possible to plant anchusa.


Planting Calendar for Anchusa

Frost tolerance for anchusa: Very tolerant of frost.
When to plant: Up to 7 weeks before last frost.

You can plant anchusa earlier in the year because they are one of those plants that can tolerate quite a bit of cold weather.

JanFebMarAprMayJunJulAugSepOctNovDec
Legend 
A good time to plant anchusa
Possibly ok, but a risky time to plant anchusa
Probably not a good time to plant anchusa

The earliest that you can plant anchusa in Allentown 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 anchusa and expect a good harvest is probably September. You probably don't want to wait any later than that or else your anchusa may not have a chance to grow to maturity. If you are starting your anchusa indoors then you might be able to get away with starting them a little bit earlier.

Last Frost Date

On average the last frost has passed is on April 15 in Allentown. It might get as low as -5°F during the coldest months of winter.

Just be sure to remember that the actual date of last frost is just an average because it is based on the USDA zone info for Allentown and it will vary from year to year. Half of the time in Allentown it frosts late in the year after April 15 so always be ready to cover your anchusa in the event of a late frost.

USDA Zone Info for Allentown

Here is the info for USDA Zone 6b.

Average Date of Last Frost (spring)April 15
Average Date of First Frost (fall)October 15
Lowest Expected Low-5°F
Highest Expected Low0°F

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

Plants to Grow in Allentown

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