The USDA Zone info is a great tool for gardeners to help us determine 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 Portland should be reffered to in order to figure out when it's the best time to plant transvaal daisy.

Planting Calendar for Transvaal Daisy

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

Transvaal Daisy do ok in some cold which tells us that you can plant them a bit earlier in the year than more sensitive plants.

The earliest that you can plant transvaal daisy in Portland 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 transvaal daisy and expect a good harvest is probably August. You probably don't want to wait any later than that or else your transvaal daisy may not have a chance to grow to maturity. Starting your transvaal daisy indoors is a great way to get them started a few weeks earlier.

Last Frost Date

In Portland the average date of last frost happens on April 15. In the coldest months of winter you should expect an average low temperature of -15°F.

Remember that USDA zone info for Portland is not always accurate and the actual date of last frost is different every year. Half of the time in Portland you get surprised by a frost after April 15 so always be ready to protect your transvaal daisy in the event of one of those late frosts.

USDA Zone Info for Portland

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 Portland

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