Separate names with a comma.
As far as i can say the problem should be because the plant(s) aren't getting enough calcium. The brown spots that u get are most of the time...
u can also go to www.canna.nl. This site is also available in english. When u enter the site u have to go to growinfo and then to info courier....
hi...u can go to www.canna.nl and this site is also available in English. There u can go to the tab growinfo and then to the info courier. U can...