Ross Penhallegon

Horticulture Extension Specialist (Retired)

Content by Ross Penhallegon

Growing Tree Fruits Successfully

Soil, site, irrigation, selection, pruning/thinning, and integrated pest management.

By Ross Penhallegon, | Presentation

Is a dog latrine a bad place to grow vegetables?

I'm very concerned about the health hazards of eating food grown in the beds where a dog has pooped. At this point, I could build a fence around the whole garden to stop any further damage, but I'm wondering about the existing and persistent harm of bacteria or worms that may now be in the soil. My...

By Ross Penhallegon, | Featured Question

Is my apple tree wounded?

I have a Gala apple tree, around 5 years old. It is a good producer and appears to be in good health, but as you know, requires lots of attention... spraying, etc. I had some apple scab problems with it for the last two years, which I gather is pretty common with Galas, but now seem to have that...

By Ross Penhallegon, | Featured Question

Nitrogen-Phosphorus-Potassium Values of Organic Fertilizers

Organic fertilizers are used to improve soil quality and tilth, and to provide nutrients for plant growth. They provide nitrogen, phosphorus, and potassium, as well as other elements essential for plant development and overall good health.

By Ross Penhallegon, | Educational Document

Symphylans

Have you noticed slender, white pests resembling tiny centipedes in your soil that have damaged your small vegetable plants? They are symphylans.

By Ross Penhallegon, Pat Patterson, | Article