Shrubs & trees, yellow foliage, variety often used for screening, "cones," 18 to 35 feet tall.
Moist well-drained soil.

Cankers
Drowning
Scorch
Winter Injury

Tolerates moist shady conditions.
"Cones"
40+ feet tall.

Wood rot
Canker-die back
Catkin deformity-leaf spot

Tolerates wide range of growing conditions, green - white & blue species, 50+ feet tall.

Verticillium wilt
Canker
Leaf spots including:

anthracnose

Ash ring spot
Root rot
Wood rot
Collar rot

Ash border
Aphids
Flower Gall of Ash
Plant Bug
Cotton Maple Scale (male trees only)
Emerald Ash Borer

Green & purple variety, thorns, often used as hedge.

Verticillium wilt
Canker

Like cool, moist acidic soils. White -grey- paper - canoe - river species. Buy resistant variety. (Heritage is creamy white, white spire is white, both hybrids of river) river is borer resistant, depending on species - 40 to 120 feet tall possible.

Chlorosis
Root rot
Canker
Scorch

"Haystack trees" - Branches low to ground, moist well-drained soils.
"Nut is toxic," 40 to 100 feet tall.

Leaf Blotch
Scorch
Canker
Wood rot

Decidouos to semi-evergreen, ground covers to medium tall shrubs, arching forms.

Fire Blight
Canker
Root rot
Winter kill

Buy disease-resistant varieties, white, pinl, red flower varieties, pea to apple size fruit. Green to purple foliage. Vase-oval-upright-spreading shapes, 8 to 40 feet tall.

Scab
Rust
Canker
Root rot
Sun scald
Winter injury
Wood rot

Red & yellow twigs mostly grown white flowers. Need severe yearly pruning to keep healthy.

Canker
Root rot
Borers
Botrytis Blight
Spot Anthracnose

Well-drained, moist, rich, acidic soils, sun, high humidity. 40 to 200 feet tall (not true fir)
Blue foliage.

Needle cast
Needle Blight
Wood rot
Tip Blight
Canker
Root rot

Ground cover, vine, shrubs, small trees.

Crown Gall
Verticillium Wilt

Considered "Pest free," medium grower once established, smelly fruit - seed used as memory enhancer, male/female trees, fall color golden, last two weeks and sheds all leaves in less than 48 hours. Pyramidal forms. 50 to 80 feet tall.

Good street tree - tolerates wide range of growing conditions. Growth & leaves size, shape, appearance similar to American elm. 40 to 60 feet tall.

Witches Broom
Root rot
Wood rot
Island Chlorosis
Canker

Most have thorns (thornless cockspur), Washington-cockspur-downy, white flowers, red grape size fruit.

Rust
Canker
Root rot
Fire Blight
Leaf Blight
Leaf spot
Wood rot

Get thornless/ podless honeylocust, sunburst has yellowish new growth, tolerates wide range of growing conditions, except prolong wet soils, 30 to 100 feet tall.
Coffee tree has pods, larger leaves & bigger tree than honeylocust.

Canker
Root rot
Wood rot

Buy aphid-resistant varieties.
White, pink, red flowers, green to red to purple fruit.

Canker
Verticillium wilt
Root rot
Powdery Mildew
Leaf Blight

Honeysuckle Aphid
Leaf Miner