One of the first steps you take when you are getting a good idea 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.

A way of figuring out when you can plant alyssum is to look at the USDA zone info for Conshohocken.

Planting Calendar for Alyssum

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

Since alyssum are very cold tolerant you can plant them earlier in the year than plants that are more sensitive to the cold.

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

Last Frost Date

In Conshohocken the average date of last frost happens on April 15. You can expect an average low temperature of 0°F in the coldest months of winter.

Just be sure to remember that USDA zone info for Conshohocken is an average and the actual date of last frost can change quite a bit from year to year. Half of the time in Conshohocken it frosts late in the year after April 15 so make sure that you are prepared to cover your alyssum if you have one of those late frosts.

USDA Zone Info for Conshohocken

Here is the info for USDA Zone 7a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	0°F
Highest Expected Low	5°F

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

Plants to Grow in Conshohocken

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