Question
I purchased two Morus alba trees for our school parkway in Redondo Beach, CA.  The trees are suppose to grow 40'. In doing research it seems they are the fruitless (good), but I'm now concerned they will attract silk worms and sprout runners. Your thoughts?

Answer
The roots of fruitless mulberry are not a problem with adjacent walkways or drives. The roots will usually spread about 1 1/2 times the spread of the foliage but will go under the walkways and not cause any problems. Silkworms are not a concern in Ca. You can grow silkworms on the trees but I would doubt if any infested the trees without putting them there. IF they do it would be a learning experience for the kids. If you have mulberry leaves you can grow silkworms, which is fun for youngsters as first the worms and then the moths do their own thing.

Sounds like a good plan to me.