I have, today, been surfing the internet for more information about the Cyperus Zumula plant. What a difficult and controversial matter! So many different opinions. A veterinary says that the cat grass contains harmful essential oil thujone and the plant is not for cats.
I went back to the flower shop today just to tell them what I had found out about the plant. Hmmm . . . I got the feeling they were not interested. Both women assured me the wholesaler has sold the plants to them as cat grass and and so far there has been no complaints.
Maybe they are right in saying my cat is too sensitive ! Who knows ! I know . . . no more Cyperus Zumula for my cats.