AIS Iris Classification Bearded Irises
Miniature Dwarf Bearded or MDB smallest of the bearded iris. No taller than 8” Flowers 1.6" - 3" wide. First to bloom in spring May.
Standard Dwarf Bearded or SDB Between 8-16" tall. Flowers 4” wide. Bloom season May to June
Intermediate Bearded or IB Vary in height from 16" to 27.5". Flowers 3.5 to 5 “. Bloom season mid to late May and on into June
Miniature Tall Bearded or MTB also known as table irises Between 16" to 27.5" tall. Flowers not more than 6” in combined height and width. Bloom May to June.
Border Bearded or BB Between 16" to 27.5" tall. Flowers 5" to 8.5". Blooms with the TBs in late May to June Being shorter than TB they go well in front border and are more resistant to wind and rain damage.
Tall Bearded or TB 27.5" in height.; many varieties produce stalks of at least 38" to 42". Blooms should be considerably larger than the BB and IB’s Bloom mid May to late
June.
Miniature Dwarf Bearded or MDB smallest of the bearded iris. No taller than 8” Flowers 1.6" - 3" wide. First to bloom in spring May.
Standard Dwarf Bearded or SDB Between 8-16" tall. Flowers 4” wide. Bloom season May to June
Intermediate Bearded or IB Vary in height from 16" to 27.5". Flowers 3.5 to 5 “. Bloom season mid to late May and on into June
Miniature Tall Bearded or MTB also known as table irises Between 16" to 27.5" tall. Flowers not more than 6” in combined height and width. Bloom May to June.
Border Bearded or BB Between 16" to 27.5" tall. Flowers 5" to 8.5". Blooms with the TBs in late May to June Being shorter than TB they go well in front border and are more resistant to wind and rain damage.
Tall Bearded or TB 27.5" in height.; many varieties produce stalks of at least 38" to 42". Blooms should be considerably larger than the BB and IB’s Bloom mid May to late
June.