 Fertilization Iris forrestii : We should enrich the soil of newly planted bulbous plants with organic fertilizer; it’s not necessary to fertilize summer flowering bulbous plants during this period of the year. Exposure Iris forrestiicontinental : plant which needs to be exposed to direct sunrays.
The Iris forrestii is a rustic plant, which doesn’t tolerate the winter cold, even when the nocturnal temperatures are very low. alpine : Let's locate the the Iris forrestii in a very luminous place, preferably sunny.
The Iris forrestii can stand the cold, therefore it can be grown outdoors year round. mediterranean : These plants favour sunny exposures, where they can enjoy, even for the whole day, some direct solar rays.
Grow the The Iris forrestii in the garden, in full ground; it can stand the cold. Watering Iris forrestiicontinental : Let’s water every 0-1 weeks with 2-3 glasses of water, or even more often if the weather is hot and dry; we should always try to keep the ground slightly damp. alpine : Water regularly, every 1-2 weeks, wetting the soil thoroughly by using 1-2 glasses of water and keeping it always a bit moist, although avoiding to soak it too much. mediterranean : For a balanced development these plants need constant and abundant dampness; during this time of year it is good to water frequently, about 3-4 glasses of water at least every 0-0 weeks. Treatments Iris forrestii : During the cold months many pathogens spend the winter in the ground, at the feet of our plants; let’s treat the plants struck by black spot disease or by leaf curl disease with particular attention by applying a wide-range anticryptogamic treatment, to vaporize even on the ground. Let’s gather and destroy the leaves of the sick plants.  Iris hollandica -
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