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     Iris need at least six hours of sun daily for optimal growth. They will grow in partial shade but in most climates do best in full sun. The soil must have good drainage-plant on a slope or raise the planting area. No water should be able to stand in an iris bed

     Bare root irises appreciate being planted in July, August, or September. Potted iris can be planted at any time as long as their basic need for water is met during the entire growing season.

     A common mistake is to plant iris too deep. Iris should be planted so that the tops of the rhizomes are barely covered and the roots are fanned out facing downwards. Iris are generally planted 12-24 inches apart. Closer planting will give an immediate effect, but the plants will have to be thinned more quickly.
     Iris like to grow in well-drained soil, adding amendments to your planting bed before the iris are planted is the best method to ensure your soil isn’t too heavy or too light. Iris will grow in poorer soils but will not flower as well as they should.  Firm the soil around each plant and water in well.

     Newly planted iris need moisture to become established. Water deeply but infrequently.
Fertilize in early spring and again after flowering. We recommend bone meal, super phosphate, or 5-10-10. Follow package instructions, keeping the fertilizer at the drip line and away from the rhizome itself. Iris should be thinned generally every 3-4 years. Remove old rhizomes at the center of the clump and leave the younger growth in the ground, or dig the entire clump and replant the larger new rhizomes.
     Give extra plants to friends and donate to plant sales. It is better to destroy unwanted iris than to overcrowd your planting area. Good air circulation will prevent many diseases from getting started.
Keep your plants free of weeds and diseased foliage-cut flower stalks to the ground after flowering, and sometime in early winter remove all dead foliage.  Several fungicides on the market will take care of any disease problems that develop, just follow manufacturer’s instructions carefully.

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