Q. We are seeking your advice concerning a problem with neighbors who share a common fence-line who have planted invasive plants (bamboo) against this fence.  The large strong roots are invading our yard and landscape.  Recently they planted several more bamboo trees, which will eventually invade the rest of our yard.  Do you know how…

Q. I have been treating my thundercloud plums for an aphid infestation. We have been using neem oil and insecticidal soap once a week for about two to three weeks. Now, the trees are losing a significant number of leaves. Is this because the aphids drained the leaves of moisture and they have dried and…

Q. Dear Horticulture Guy; Several years ago, we planted three New Zealand Flax plants which have done very well.  In fact, they have grown so large that they are now crowding the street, the adjacent plantings around them and they’re even crowding each other.  How do we control them?  Should they be divided, and if…

Q. I am interested in using corn gluten on my lawn to prevent weeds from growing.  Can you provide some info on this, including which form is best to use, where to buy it, and which weeds it prevents (does it work on bind weed?).  Thanks. A.  First off corn gluten does not work on…

Q. We are new to gardening in Washington where we get moss in our flowerbeds. After raking and breaking it up, is it important also to pick it up since so much mulch or soil clings to it? Rae Ann Merrill – Gig Harbor A. Although moss is usually removed from lawns as well as…