Q - What can I do to control my mums? They were a gift last Easter and I planted them outdoors when it got warm. I keep pinching them back but they keep right on growing and they are too tall .

If possible, chrysanthemums should be planted where they get full sun all day. If they are in partial shade, they grow tall, reaching for the sun. They also grow tall when crowded.

Most chrysanthemums in the garden need to be divided in early spring every year. If there are lots of new shoots in the clump, division is important; if there are only two or three, it isn't essential.

Q - My lawn used to be Kentucky bluegrass and bentgrass but now it is practically all bentgrass. What shall I do? Do I start all over again ?

A - When bentgrass and Kentucky bluegrass are planted together, the bentgrass usually takes over in four or five years. Bentgrass needs to be mown low, between 1/4 and 1/2 inch in height. Higher than this, it becomes long and straggly and tends to mat. If mown that low, bluegrass does not survive very long.

If you are satisfied with what you have, let it go. If not, change to an all bluegrass lawn. It will be much easier to take care of and keep attractive.

Q - I have two large black walnut trees in my yard. The walnuts that are falling have small white worms inside the hull but not inside the kernel. Do they affect the edibility of the kernels ?

A - The insect is the larvae of the walnut husk fly which inserts eggs into the husk. They feed only on the husk nut but cause a stain which may penetrate the shell and if it does the kernel becomes discolored and off-flavored.

For control, keep the ground under the trees clear of trash, weeds and prematurely dropped nuts. Pick up the walnuts immediately after they fall, hull and wash them, and then dry them in ful sun.