Treating Brown Spots on Mandevilla Leaves
Fungal Leaf Spot on Mandevilla Annettes new Mandevilla has brown spots on most leaves, but no visible insects. Expert Solution The symptoms point to a fungal infection. Spray the plant with a broad‑spectrum fungicide su
Complete Care Guide for an Indoor Majesty Palm (Parlor Palm)
Keeping a Majesty Palm Healthy in a North‑Facing Office Taryn bought a Majesty Palm for a north‑facing office with a large window. She knows they need lots of light and regular watering but wants extra tips. Expert Reco
Which Houseplants Tolerate Morning Sun on a Hong Kong Balcony?
Morning Sun vs. Afternoon Heat Chandon in Hong Kong has a northeast balcony receiving strong sun from 6 am to 11:30 am. Plants include Dracaena, Monstera, African goosefoot, ferns, Ficus benjamina, and Anthurium. Which c
Overwintering and Propagating Upright Elephant Ears (Colocasia)
Do Elephant Ears Go Dormant? How to Propagate? A gardener asks if upright elephant ears must go dormant in winter or can be brought indoors, and how to propagate them. Expert Advice Winter Care: All Colocasia are frost
Fixing Brown, Curling Leaves on a Potted Musa Basjoo in Michigan
Why Are the Edges of My Hardy Banana Turning Brown? Michelle in Michigan received a Musa basjoo, keeps it in pots, and moves it indoors at night because of chilly temperatures. The leaves are browning at the edges and cu
Identifying and Caring for a Mystery Office Plant with a Red Feather‑Like Flower
What Is This Plant? Susan received a Valentines Day plant from a florist. It has green leaves radiating from a central stem and a bright red, feather‑shaped flower that has since dried. The florist advised watering in th
Reviving a Rooted Rubber Tree Cutting with Wilted Leaves
What to Do When a Rubber Tree Cutting Roots but Leaves Decline Rita cut the top of her rubber tree, potted it, and it rooted. However, the leaves are wilted and losing color. She asks if another cut will stimulate growth
Pruning a Mature Cordyline australis (Cabbage Tree)
Can You Cut a 20‑Foot Cordyline Down to 5 Feet? Christine has a 10‑year‑old Cordyline australis that stands about 20 feet tall. She wants to know if cutting it back to 5 feet will encourage new leaves to sprout from that
Growing Coffee and Avocado Trees Indoors in Canada
Can You Grow Tropical Fruit Trees Indoors in a Cold Climate? Andrea wonders if a coffee tree or avocado tree can be grown indoors in Canada, starting from seeds of store‑bought fruit. Both are subtropical/tropical specie
How to Rescue an Indoor Banana Plant from Whiteflies and Soil Pests
Diagnosing the Problem Kathy from Mesa, Arizona, noticed tiny white flies and a mysterious green insect on her new banana plant. The plant was potted in topsoil rather than a sterile potting mix, watered every other day
Troubleshooting Non-Emerging Dahlia Tubers in Cool Springs: Checking Viability and Soil Temperature
Dahlias Not Sprouting After 5‑6 Weeks in NW Washington Cool soil delays emergence. Dig one tuber to check: firm with a visible sprout = viable; mushy = rotted. Factors Plant fat side (crown) down. Soil temperature above
Propagating Bougainvillea from Semi-Hardwood Cuttings: A Simple Rooting Protocol
Cloning Your Bougainvillea Color Take 5‑inch semi‑woody cuttings, dip in rooting hormone, stick in a moist starter mix, cover with a ventilated plastic bag (mini‑greenhouse). Keep damp, not wet. Roots in 2‑3 weeks. Harde
Assessing Survival of Storm-Damaged Allamanda: The Cambium Scratch Test
Allamanda Reduced to a Stump Winter storms broke all branches. The stub looks healthy, but no growth by spring. Test Scratch the bark on the remaining trunk. Green cambium = alive; wait for regrowth (can be slow). Brown
Reviving a Declining Money Tree (Pachira aquatica): Recognizing and Fixing Pot-Bound Roots
Yellow/Brown Leaves on Pachira = Pot‑Bound The roots have filled the pot, preventing even water distribution. Fix Repot into a larger container. Add 2 inches of pea stone for drainage. Use a light, well‑draining potting
Growing Pagoda Flower (Clerodendrum paniculatum) in Containers: Tropical Care for Puerto Rico
Clerodendrum paniculatum in a Large Pot This tropical shrub thrives in your climate with minimal fuss. Container Culture Full sun to light shade. Rich, well‑draining soil. Water as needed—dont let dry out completely. Fe
Rescuing a Majesty Palm from Scale and Cultural Issues: Repotting, Light, and Pest Control
Majesty Palm in a 16‑Inch Pot: Scale and Stress The sticky substance and bumps are scale insects. The brown tips indicate cultural stress (pot‑bound, low humidity, possibly too much sun). Rescue Plan Repot into a contai
Reducing the Size of Giant Bird of Paradise: Rhizome-Preserving Pruning Technique
Cutting Back Strelitzia nicolai in San Francisco To reduce height, cut entire shoots off at ground level. The underground rhizome remains intact and will send up new, shorter shoots. Key Points Remove whole shoots for a
Controlling Whitefly Larvae on Bougainvillea in Mediterranean Climates: Horticultural Oil Treatment
Cottony Masses on Bougainvillea in Spain The white cottony clusters are whitefly larvae wrapped in wax. Treatment Prune off heavily infested branches. Spray remaining foliage with horticultural oil (e.g., Ultra‑Fine Oil
Diagnosing One-Sided Decline in Ponytail Palm: Pot Size, Planting Depth, and Watering Cues
Ponytail Palm (Beaucarnea) Asymmetric Browning The pot is too small, and the plant may have been set too deep during repotting. Corrections Repot into a significantly larger container. Ensure the trunk‑root junction is
Four‑Year‑Old Poinsettia in Minnesota The plant is leggy and sparse. Hard pruning and repotting will force bushy new growth. Rebloom Protocol Cut all stems back to 6‑8 inches. Repot in fresh soil, larger pot. Summer: da
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