Specialty Gardening: Jocie gave me a jump start, 1 by Lily_love

Lily_love wrote:
Just to illustrate my observation. These are the identical verbena I've planted. The smaller pot is plastic, presumably the commercial potting soil is naturally acidic. Last year they color were uniformly medium blue.
The bigger pot is a hypertufa that I made, I used the pot soon after it was cured, and I understood that cement material will bleach akalinity to the planting. This year the contrast of the blooms b/w the two pots.
*Notice the lighter blooms of the hypertufa pot, compared to the other smaller plastic one.