Dyers Chamomile (Matricaria recutita) is perfect for natural dyeing and comes as whole dried flowers which can easily be added and removed from the dye bath - you could also infuse first then use the dye liquor for your natural dyeing.  Whole dyestuff is perfect also for yarn dyeing where you wish to avoid any particles remaining in the batch. 
 
Chamomile flower yields a bright yellow colour depending on quantity used, the fibres used, and the pH of your dye bath too (i.e. whether you use any dye modifiers such as acids or alkaline).  With dye modifiers you can achieve many shades of yellow, creamy yellow, bright yellow, and olive green.  Mordants are recommended so use Alum mordant for when dyeing animal (protein) fibres, and a tannin plus ALUM or Aluminium acetate when dyeing plant (cellulosic) fibres.
 
Smallest pack size supplied is 100g
 
Recommended use is at least 100% weight of fibre/fabric (WOF) to reach a bright yellow colour