Here are averages that might help you know how often you should change the air filter at home: Vacation home or single occupant and no pets or allergies: every 6-12 months Average suburban home without pets: every 90 days
Rating Newest Oldest. Best Answer: Cut off dead blossoms and dead bloom stalks when the iris has stopped blossoming, but don't cut back the leaves until they begin to turn brown in the fall. The leaves are needed to produce next year's blooms. When you do cut, leave a fan shape about six inches long. Feed your irises a teaspoon of bone meal every fall and when you replant. You can feed again a month before they usually bloom if you like, but they are quite tolerant of just one feeding..
Step 1. Plant iris bulbs in the fall into rich well drained soil that receives a full sun to a half day of sun exposure year round. Half days of sun are tolerated in warmer climates, but iris bloom most profusely when they receive day long sun.Bury the bulb 5 inches deep leaving the top of the rhizome exposed above the soil.eed your iris with a good quality granular bulb fertilizer in the spring to boost bloom. Follow dosing directions on the package. Water in the fertilizer well after application to drive the nutrients down to the bulb and roots.