General tree information

  • All resources in general tree information 250
  • Environmental factors and damage 19
  • Fertilization and soil management 53
  • General information 250
  • Insects and pests 3
  • Plant health care 61
  • Tree diseases 9
  • Tree management and consulting 5
Olive

Naturalized in many regions, olives have long been cultivated in Europe, Africa, the Middle-east, and California....

Olive

Originated in Eastern Mediterranean area, with the earliest references to olive oil use and international trade dated...

Pear

Pears have been consumed since prehistoric times and are thought to have originated in China. Check the ripeness of...

Peppertree

Widely planted as ornamental trees, both California peppertree and Brazilian peppertree are non-native species that...

Persian Ironwood

Parrotia persica (commonly called Persian ironwood) is a wide spreading (8 to 15 m), often multi stemmed deciduous...

Photinia

Photinia, or 'Red Robin,' is an evergreen shrub commonly used hedging, and is popular as an ornamental due to a flush...

Phytophthora root disease is a widespread but often overlooked disease of landscape plants. The name, Ph…

Pieris, formerly named andromeda, is an evergreen shrub group with year-round appeal. The most common species is Japa…

Pin oak (Quercus palustris) is a fast-growing, large-maturing shade tree with a pleasing oval-pyramidal…

Pittosporum

The genus Pittosporum is some 200 species strong but most are only suitable for growth in warm climates or under...