One reader asks how to divide up bearded irises to produce healthier blooms. Another questions what to look for when buying spring blooming bulbs. Two garden experts share their advice.

When to plant bulb irises If you want to fill your garden with beautiful bulbous irises next spring or summer, you should ideally add this task to your list of jobs to do in the garden in September.

For bulbous irises, gently pull apart the individual bulbs and replant them about 3 inches below the soil’s surface. For bearded and Siberian irises, rhizomes should be cut into pieces with a ...

Iris Transplant Q: I wanted to know if you can dig out bulbs of irises from one yard to another. The irises have been in the yard for many years. Will they do OK in my yard if I dig them out and tr… ...

IRISES: Louisiana irises may benefit from a light application of a general purpose fertilizer now or in early February to encourage vigorous growth and abundant flowers. Control weeds and keep the ...

August is the perfect time to plant these 14 spring-blooming bulbs. They thrive in various hardiness zones, but you'll want ...

There is also the pygmy iris (Iris pumila), a highly hybridized species that grows from bulbs to a height of 4-8 inches. Flowers have features of both bearded and Dutch irises.

Like the iris, after they’ve grown a while, your rain lilies might need dividing. Rain lilies are true bulbs and, like other bulbs, multiply underground when they are not busy producing flowers.

Submit your questions as comments and check back for answers. Old House Gardens Heirloom Bulbs sells some historic perennials that are not technically bulbs, including peonies and bearded iris.