Gardening answers from Paul Schnare--6/11

If you missed Monday's Breakfast Show on June 11th, here is a brief synopsis of Master Gardener Paul Schnare's answers.
1.) "I have a Mother-in-Law's Tongue plant that is about 40 years old.  It has bloomed several times in the past few years.  The bloom gives off the most-offensive odor!  The plant has become root-bound and I would like to separate it.  I have transplanted it several times over the years, with success.  However, I need to know how to separate it.  The original plant was given to me back in 1972, when my mother died, so I really do not want to risk losing this plant!  ----Maggie Hoerler, McLeansboro, IL
Paul's Answer:  To divide a monther-in-laws tongue, take the plant out of the pot and wash away all of the soil.  Then look for "natural divisions" in the root and crown.  Split the plant at those divisions.  Repot the sister plants in very small pots, not more than 1" diameter larger than the divided crown.  Plant the sister plant in a light potting mix, not a potting soil.  Water thoroughly, and place in a high light location, but not in direct sunlight. 
2.)  "Last year, we had a fungus on our irises and you recommended a fungacide. This helped greatly. We still have some spray left over. Should we use it again this year? Just wanted to know if we should spray every year? Thanks!"  ---Lula and Harley Rhyne
Paul's Answer:   If you have had disease problems on your plants last year, I would go ahead and start a fungicide program on them this year.  Perhaps, skip the following year if your plants show no signs of disease this year.
3.) "I found what looks like seed pods in my mother's irises. I thought they could have come from bulbs. Do they eventually make seeds?" ---Carol McDonald, Morehouse
Paul's Answer:  Iris blooms produce seed.  This seed is the source of new varieties.  Once a new variety is found, it then is propagated by divisions of the rhizomes so that other gardeners can also have that same variety. 
4.) " When is the best time to divide Hostas?" ---Heartland Gardening Viewer
Paul's Answer: I would divide hostas in the early spring, right when they begin to emerge from the soil.  Division will stress the plant.  Therefore divide the plant in the spring, during a period of rapid growth.  This will allow them to overcome the stress of division.
For the latest gardening advice, be sure to tune in to the Breakfast Show on Mondays and Saturdays during the 6 to 7 a.m. hour, and set your recorder, if you can't watch.