Lilac Bark Lichens: Symptom of Decline, Not Cause

Lilac branches dying with greenish-grey spotted coating. Affected branches leafless. Asks: fungus? Treatment? Expert Assessment Steve: coating likely lichens on older/declining woody plants. Lichens dont cause decline—t

Container Garden Scale and Sooty Mold: Homemade Oil Remedy for Remote Location

Liz (near Guadalajara, Mexico): container garden in full sun. Scale on triangular palm, croton, others. Black granular coating on trunks/leaf backs. One croton dropped all leaves. Far from garden store. Asks: substitute

Air Plant Neglect Recovery: Immersion Rehydration Protocol

Kathleen: air plant brown/wilted after weekend alone. Photo provided. Asks if savable. Dehydrated air plant Expert Recovery Protocol Kathy: if any green remains, dont discard. Immerse in water up to 12 hours Repeat 4

Oak Insect Galls: Benign Wasp Nurseries on Mature Tree

Suzanne: Northern California mature oak with clustered nodules/pods on branches. Green when small, brown tennis-ball size when mature, fall off. Tree flowering, otherwise healthy. Expert Assessment Steve: likely insect

Oak Horned Gall Wasp: Beneficial Insect Architecture

Rebecca: roundish growths with root-like projections on large oak. Thought wasp galls. Doesnt mind hosting but fears tree death. Photo provided. Oak horned gall wasp structures Expert Identification Steve: horned oak

Sago Palm Yellowing: Soil Testing for Root Zone Diagnosis

Othell: two sagos with yellow leaves. Asks: soil not acid enough or other cause? Expert Assessment Steve: yellowing = multiple causes. Usually soil/root issues (fertility/water imbalance), especially in containers. Soil

Japanese Maple Sun Scorch: Shade Species in Wrong Exposure

Della: two young Japanese maples planted 2 weeks ago. One thriving, other wilted/dried leaves. Peat moss/topsoil mix. Morning shade until noon, then direct sun. 15-20 ft apart. Daily watering. Asks: move? Miracle-Gro? Sa

Maple Leaf Galls: Harmless Insect Structures, No Human Risk

Olga: daughter climbs maples, fears red pimples on leaves contain bugs. Asks human health effects. Expert Assessment Steve: insect galls (many types). Insignificant to tree health. Rake/destroy fallen leaves in winter (

Mature Poplar Progressive Decline: Internal Decay Management

D: 50-year-old poplar (grandfather planted). 3 years ago: half branch dead. Next year: whole branch + half another. This year: half tree gone. Southern Idaho, agriculture area. 60 ft tall, 3 ft trunk. 15 ft from road, ir

Eastern Red Cedar Annosus Root Rot: Forestry Commission Diagnosis Needed

50-ft eastern red cedar (16-20 DBH) dying: sparse yellow foliage. House built 100 ft above. Pine thicket cleared around it. Asks diagnosis/treatment in West Central Alabama. Expert Diagnosis Annosus root rot. Cedar high

Dwarf Alberta Spruce Mite Control and Deep Feeding DIY

Sam: paid TruGreen for dwarf Alberta spruce mite treatment and deep feeding. Asks DIY methods. Expert Guidance Spider mites require miticide (not insecticide). Bayer Advanced 3-in-1 Insect, Disease and Mite Control reco

Citrus Sooty Mold: Friendly Fungus with Organic Solution

Cindy: lemon tree with black coating on leaves (photo provided). Lemon with sooty mold coating Expert Diagnosis Kathy: sooty mold (friendly fungus). Turns leaves black, blocks sunlight absorption. Treatment Options

Flowering Plum Post-Bloom Transition: Normal Seasonal Progression

Flowering plum bloomed normally in April. Now: few leaves, green/limp (not purple), bark fine. Other two plums great. Expert Assessment Nearly normal. Leaves emerge after bloom fades. Summer approaches → leaves change f

Sago Palm Pruning Sap: Normal Wound Response

Olivia: clear gelatinous substance in clusters on cut sago palm limbs. Not sticky. Asks for help. Expert Assessment Steve: plant sap response to pruning injury. Combination of plant juices, not disease/insect. Will dry

Garden-Wide Contact Injury: Herbicide Drift Diagnosis

Brandon: light whitish-tan spots on virtually every plant (even weeds) in garden. Asks: soil deficiency, excess fertilizer, or disease? Spotting across multiple unrelated species Expert Diagnosis Steve: unrelated plan

Oleander Seasonal Leaf Shed: Temperature Stress Response

Margie (SC): neighbors oleander yellowing/dropping ~half leaves. No pests visible. New growth healthy. Asks if normal. Expert Assessment Steve: sudden night temperature drop can trigger leaf shed, especially this time o

Meyer Lemon Leaf Curl: Virus Unlikely, Insect/Chemical Investigation Needed

Charles: potted lemon, leaves crinkle then fall. Asks if virus and treatment. Expert Assessment Steve: virus unlikely (far down list). No virus cures exist anyway (hijack plant cells, need wound entry). Investigation P

Yoshino Cherry Bloom Failure: Environmental Puzzle on Paired Trees

Ray: two Yoshino cherries flanking driveway. One bloomed fully, leafed out, healthy. Other full of buds but wont open. Buds green inside, limbs green/pliable under bark. Expert Assessment Steve: puzzling. Assuming synch

Pink Dogwood Anthracnose: Comprehensive Disease Management Guide

Central Oklahoma: 3-year-old pink dogwood in light shade. Top branches blackened/shriveled leaves, wilting. Expert Diagnosis Dogwood anthracnose. Detailed symptom progression: Leaf: spots, blotches, blighting (whole le

Fruitless Mulberry Decline: Internal Decay After Pruning

Julie: old fruitless mulberry was lush when moved in. Trimmed winter before last. Leaves sparse since. 2-3 large dead branches. Ground cover at base. Asks if savable. Fruitless mulberry with sparse canopy Expert Asses