By Caroline
Bedfordshire,
United Kingdom 
Does anyone know anything about Calindrinia Bianca? I saw an Unwins seed packet yesterday saying it has seed heads that birds like. So far I have only been able to find out that it is a herb, it's not listed in my books or the RHS website. I want to know if it spreads before I try and grow some.
13 Jan, 2013
Answers
my big RHS book has Calindrinia listed but not C.bianca. They tend not to be thugish in my experience I grew rock purslane C umbellata and it was short lived 3 yrs, but did self seed quite freely. The harsh frosts 20yrs ago saw it off.
13 Jan, 2013
It is a form of Calandrinia ciliata which is an annual.
13 Jan, 2013
Previous question
This is the best info I was able to find:
http://www.seedsbypost.co.uk/shop/15084/calindrinia-bianca-natures-haven/
No indication that it is a thug but you could always grow in a pot the first year and see how it behaves.
13 Jan, 2013