Question. All of a sudden, our plumeria has developed yellow leaves with an orange coating on their backsides. What should I do to control the decline? Answer. Many of our favorite flowering plants ...

Q: I love hollyhocks for their colorful, crinkled flowers, and I have a row of them planted along the edge of my patio which I grew from seed. I was disappointed last year, however, as unsightly ...

What happens when you combine mild weather, rain that lasts for a day or two, and rapidly growing plants fighting for space? Besides a bounty of flowers, foliage might take on an orange-splattered ...

Question: You recommended a fungicide for an orange rust control on plumeria. The rust fungus seems like a natural occurrence, especially as the leaves decline in the fall. I have developed the ...

Myrtle rust is a devastating fungal disease that affects lilly pilly, myrtles and gum trees. Here's what it looks like and how to remove it.

Q: Some of my snapdragons are covered with dark spots and it seems to be spreading to neighboring plants. What can I do to stop this problem? A: From examining your plant sample, the problem is a ...

Rust disease is among the more interesting plant diseases because it requires two different plants to complete its lifecycle. There are a variety of rust diseases, including cedar-apple rust, Asian ...

Early in April, I was looking for the first of the spring flowers in the mountains and had found pasque flowers and, to my surprise, mountain ball cactus in bloom at Meyers Gulch, near Walker Ranch.

It took decades of painstaking work, but a research geneticist managed to cross a popular soybean variety with a related wild perennial plant that grows like a weed in Australia, producing the first ...