those spots mold or water mark?

[metorik]

i use fabric pots first time. are these white marks normal? like wet, sweaty shirt or.......?

 

[BunnyAnd.Ducky]

It's the fertilizer crystalized

 

[Wh1teScorp1on]

Salts from your fertilizers. You can spray with water or light peroxide solution to dissolve them. Does no harm really. If you reuse your bags just wash under fresh water. Dish soap works a trick.

 

[metorik]

thanks guys, u r right. thats just salt. a little extra extra search i found same topic/problems on forums. i must search better before open post but u know, 6am, mold, panic.... xD

 

[Homesteader]

Epsom salt most likely. Magnesium sulfate leeches pretty readily.