Four propagation options I. virginica grows wild from New Jersey to East Texas. It seems highly adaptable to varying pH levels and has no serious pests. It can be propagated by hardwood cuttings, softwood cuttings, division or seed. Sweetspire will grow from softwood cuttings with or without an indolebutyric acid treatment, but a quick dip in 3,000 parts per million IBA nearly ensures 100-percent rooting. Cuttings need about four weeks to root.
Sweetspire seeds are also quick to grow and require no pretreatment.
It is cold hardy to minus 20F and roots readily from softwood cuttings.