How can I stop my tree from producing suckers?

I have a beautiful river birch in my front yard, but it suckers so much at the base that it looks like there's a separate shrub growing at the bottom. I have to trim it back several times each year. How can I get it to stop - or at least reduce or slow the growth? ks

Submitted by k2schneider

There are commercially available products called tree sprout inhibitors that can be applied to the pruning cuts that you make when removing suckers to prevent or reduce the amount of regrowth. The active ingredient is usually naphthalene acetic acid (NAA).

Answered by DSchrock