Iris “Midnight Fragrance”
Plant Abstract

Known as- Tall bearded iris
Grow Zone - 3 to 10
Type- Herbaceous perennial
Familial- Iridaceae
Smith Scl. hardy? No
Geography- None
ht.- 2.5 to 3 ft.
Span- 1 to 2 ft.
Coloring- Violet-black
Shade/Light- Full sun
Moisture- Medium dampure
Hi/Lo Maint- Medium
Best grown in humusy, moderate wet, well-drained soils in full sun. Best flowering and disease resistance occur in full sun. Good soil drainage is essential to combat potential soft rot problems. Avoid use of mulch for the same reason. Heavy clay soils such as those present in much of the St. Louis area must be amended prior to planting (e.g., add gypsum, coarse sand, organic matter) or raised plantings should be considered. Plant rhizomes shallowly (cover with 1/2’ soil) and 12-24’ apart in mid to late summer (July to early September). Fertilize lightly in early spring. Deadhead individual spent flowers and remove flowering stems to the ground after bloom. Divide plants when overcrowding occurs (every 3-4 years).
“Midnight Fragrance” is a tall bearded iris which typically grows to 36’ tall and slowly spreads by rhizomes. As the cultivar name suggests, blooms are sweetly fragrant. Standards and falls are dark violet black and ruffled. Blooms in spring. Sword-shaped, linear leaves. C. Hahn 1989.
The major insect pest of bearded iris is iris borer. Major disease problems are bacterial soft rot and fungal leaf spot. Good sanitation practices are the most important component of any disease/insect control program- promptly remove and destroy diseased foliage/rhizomes, promptly remove and destroy borer-infected foliage/rhizomes and perform an annual clean-up of all debris and foliage from beds in fall after frost. The most frequent causes of failure to flower or sparse flowering are (1) rhizomes are planted too deep, (2) plants are located in too much shade, (3) plants were given too much fertilizer or (4) plants have become overcrowded and need division.
Common Applications-
Shade/Lightny beds and borders.