Jessica Walliser

Some tree care required in summer

Caring for your trees is an essential summer chore. While this isn't the right time to be doing any major pruning, it is the ideal ...

Sedum will form roots all along its stems, making it easy to propagate

Q uestion: I have some sedums growing along my driveway, and I'd like to have more of them. They bloom beautifully in the late summer. ...

Bag yourself a healthy grape harvest

Grapes are a popular backyard fruit. With a little effort, it's possible to harvest bushels of this delicious fruit from just a few vines. When ...

Some onion varieties can be picky about day length, soil pH

Q uestion: I would like to know how to make my onions get bigger in the ground so I can store them over the winter. ...

Melons require extra care in Western Pa.

Growing good melons in Pennsylvania isn't always easy. Watermelons, cantaloupes and other members of this delicious family love hot weather and need plenty of moisture. ...

Mites may cause unsightly growth on maples, but it won't hurt the tree

Q uestion: I am sending you pictures of my maple tree. Last year, the same thing happened toward the end of the summer. Many leaves ...

Walliser: These roses are fuss-free, fragrant

In 1986, the rose was designated the national floral emblem of the United States. There's no doubt the rose is among the most recognized and ...

Remove plants infested with whiteflies to prevent pests from spreading

Q uestion: Last summer, my tomato plants, grown in containers, developed whiteflies. I tried various sprays, but they always returned. During the past winter, I ...

Cedar apple rust beautiful, harmful

There's a fungus among us, one that is both fascinating and destructive. It's called cedar apple rust (Gymnosporangium juniperivirginianae), and it requires two different host ...

Not enough sun, too much nitrogen can keep peonies from budding

Q uestion: We were given some peony plants by my sister-in-law four years ago. They came from her garden. The plants they came from always ...

Branch out with these less-common flowering annuals

It's annual planting time here in Western Pennsylvania, and while most gardeners are familiar with common flowering annuals such as marigolds, geraniums, petunias and impatiens, ...