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David O.

Master Gardener / Retired Biology professor

trees and shrubs fruits and vegetables wildflowers and native plants lawns and turf indoor gardening sustainable gardening and landscaping landscape design master gardener program insect issues disease issues weed issues horticulture flowers: annuals and herbaceous perennials soil and fertility issues

Expertise Locations

Pennsylvania

  • Entire state

Answered Questions

Black walnut tree problem

What is this white spongy ooze on my maple trunk?

Monkshood extermination

Pachysandra Diseases

My holly tree is about 30foot high quite old about 80 years old.

Tomato Leaf Problems

Hole in Cherry blossom tree

What can I do to help him?

Browning Green Giant Thujas

Praying mantis... x2


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