Iris appreciate this organic-mineral fertilizer with 6 in Nitrogen, 8 in phosphate and 12 in Potash. 100g/square meter are sufficient, to be lightly worked into the soil always taking care not to hurt the root system. This product is certified "organic" and has a long lasting effect. Feeding once a year is enough. (Sold in 500g bags)
from mid-june to the end of october
March and April / Mid-august to mid-novembre
September - October - November
returns can not be accepted.