White Growth on Lilac Trunks: Likely Harmless Lichens

A 7-foot lilac bush shows white mold-like growth on lower thick trunks, starting 1-2 inches above ground. Higher branches are unaffected. The description matches lichens—symbiotic organisms of fungi and algae that common

Yellow Fungus on Pear Tree Bark: Identification and Management

A pear tree of unknown age has developed a yellowish fungal growth on its bark. Last year it bore abundant fruit, but this year no fruit appears. A nearby fig tree shows similar symptoms. The yellow fungus likely represe

Red Sunset Maple Leaves Turning Brown: Causes and Solutions

An 8-year-old Red Sunset Maple that has thrived for years suddenly shows distress: after blooming and producing green leaves this spring, the foliage is now turning brown, drying up, and falling off. The owner in northea

Privet Hedge with Curly Yellow Leaves: Overwatering Suspected

A young privet hedge (started in pots, planted 9 months ago) shows narrow, curly yellow leaves, worst at base, spreading. Owner waters heavily daily; no chemicals; cats visit. Expert Assessment Steve suspects root rot f

Canadian Hemlock in Hedge Defoliating Top-Down: Trunk Damage Likely

A 16-foot hemlock in a 15-year-old hedge has lost 65% of foliage from the top down since last fall; bottom is green with new growth. Neighbors are healthy. Diagnosis: Trunk Injury or Borers Melissa believes the most pro

Mushrooms at Base of 50-Year-Old Mimosa: Possible Root Disease

A huge, beloved mimosa has mushrooms growing at the base on one side. Owner wants to save it. Expert Response Steve requests a photo. Mushrooms attached to the tree suggest root disease (e.g., Armillaria). No magic bull

Princess Tree (Paulownia) Yellowing Leaves in Germany: Water, Borers, or Damage?

Two 5-year-old princess trees flowered but now have yellowing, dropping leaves. Owner in Germany seeks cause. Potential Causes (Melissa) Water stress: Too much or too little. Check soil moisture; water deeply weekly if

Ficus Leaves Folded with Tiny Black Bugs: Thrips Infestation

A patio ficus had leaves folded in half; opening them revealed colonies of tiny black bugs. Owner had never seen this before. Identification: Thrips Thrips are 1/16–1/8 inch, yellow/brown/black, slender insects that pun

Juniper 'Tam' Ground Cover Yellowing After Extreme Wet Spring

Mature Tam junipers (10–15 years) on a bank in north-central Oregon turned yellow in patches after an exceptionally wet spring. Neighbors plants turned brown and appear dead. Normal climate is high desert. Cause: Junipe

Angel Trumpet Leaf Spots, Holes, and Yellowing: Heavy Feeder Needs More Food and Water

Angel trumpets bloom well but leaves develop burnt-looking spots that become holes, then yellow and drop. Photos show calla lilies in background, suggesting possible underwatering. Diagnosis: Low Fertility and Possible

Maple with Northern Tooth Fungus: Long-Term Decay, Plant a Successor

A maple has heart rot from northern tooth fungus (Climacodon septentrionalis)—hollowing in a main trunk. Crown looks good. Owner wants to plant a replacement now. Understanding the Fungus Decay fungi enter through bark w

Magnolia Scale on Mature Tree: Oil Treatment Guide

Mature magnolia (NE US) has pencil-eraser white fuzzy patches on branches. Lift off → pink fleshy liquid oozes. Owner asks about systemic remedy. Magnolia Scale Identification Large scale (up to 1/2). Pink liquid = body

Scale Infestation on Pittosporum: Oil Treatment Protocol

10-ft pittosporum in SC Zone 7: no bloom, yellow leaves, dead branches, black dots circling lower trunk. Scale Confirmation Black dots = scale insects. Immobile, shell-protected, suck juices → decline. Undetected until

Aphids Preventing Peace Lily Bloom Opening

Healthy peace lily produces abundant blooms that stay closed, brown, sticky. Aphid Diagnosis Sticky coating = honeydew from aphids. Buds fail to open due to feeding damage. Treatment Insecticidal spray: Aphid-labeled

Monkey Puzzle Tree Trunk Fissures: Arborist Evaluation Needed

Two 40-ft monkey puzzle trees in yard. Both develop southwest-facing trunk cracks (front: 2 ft up, 3 ft long, 6 in wide, white ooze visible; second crack forming above; back tree: smaller basal crack). Owner fears failur

Pin Oak Leaf Galls: Fungal Blisters vs. Insect Galls

Two large pin oaks have raised yellow bumps (mm to pea-sized) on nearly all upper leaf surfaces. Leaves otherwise shiny green. Initial Diagnosis: Oak Leaf Blister Fungal (Taphrina). Blister-like spots, leaf distortion.

Transplant Shock in Relocated China Girl Holly

Eight China Girl/Inkberry hollies moved to sloped detention basin area. Two in drier spots show light green perimeter, leaf curl, interior green. Watered 10 min every other evening. SE PA, heavy downpours with runoff. T

Aphids on Indoor Meyer Lemon: Organic and Chemical Options

5-6 year old indoor Meyer lemon (SW window) shows translucent/yellow leaf areas with brown raised patches underneath. Sparse, stick-like growth. Blossoms and fruit set but some drop. Aphid Diagnosis Symptoms = aphid fee

Late Blight on Peppers: Sanitation and Cultural Control

Green peppers show soft brown spots at stem end (not blossom end). Overhead watering, no chemicals, healthy leaves, 5-10% fruit affected. Photo shows whitish centers. Late Blight Confirmation Phytophthora (fungus-like)

Gloxinia Bud Rot: Watering, Light, and Botrytis

Gloxinia buds, young flowers, and peduncles turning brown, soft, watery in 30°C humid room. Owner asks about cooler relocation. Differential Diagnosis Watering: Moist soil needed, but overwatering → root rot (check roo