Petunia vs. Impatiens: How to Tell Them Apart Instantly

Many gardeners confuse petunias and impatiens. The difference is simple once you know the flower structure. Quick ID Guide Petunia: Trumpet-shaped (funnel-form) flowers, often with ruffled edges. Single or double. Stic

Caring for a Gift Hanging Petunia: Pruning, Overwintering & More

A birthday gift hanging petunia has dead stems. Can you remove them? Yes—dead stems emit ethylene gas, which accelerates aging of nearby flowers and leaves. Removing them is beneficial, not stressful. Pinching vs. Pruni

Mystery Vine: Large Leaves, Yellow Flowers, and Gourd-Like Fruit

A Michigan gardener planted flower seeds but got a vigorous vine with large leaves, big yellow flowers, and developing gourd-like fruit—nothing like the package picture. Without a photo, identification is guesswork, but

How to Keep Petunias Bushy and Blooming All Season

Petunias bloom only at stem tips. Without intervention, stems elongate, leaving a leggy plant with flowers only at the ends. The solution is strategic, repeated pruning—not just deadheading. The Pruning Strategy Start

Reviving Struggling Ivy Geraniums in Hot Climates

Red ivy geraniums in hay-lined iron baskets on a Southern California balcony show black leaves, red spots, brown hardened stems, and poor growth after a year. The issues stem from cultural practices ill-suited to the cli

Impatiens Wilting in Heat? Why They Collapse and How to Save Them

Three hanging impatiens baskets on the front porch wilt daily, while one on the back porch thrives. All came from the same greenhouse, get the same care, and are watered religiously. The difference? Microclimate and extr

Why Did My Pink Hydrangea Turn Blue? Soil pH Explained

You planted a pink hydrangea, but a year later its sporting huge royal blue flowers. The color change isnt magic—its soil chemistry. Hydrangea flower color (for many pink/blue varieties) is directly controlled by soil pH

Why Your Ivy Geranium's New Growth Is Turning White in Extreme Heat

If youve transplanted a deep purple ivy geranium and watched its new leaves emerge pure white, youre not alone. This puzzling symptom often appears after moving the plant, and its not caused by fungus or nutrient deficie

Dahlias and Geraniums Not Blooming in Heat: Nitrogen, Temperature, and Photoperiod Effects

Gardeners dahlias and geraniums in same pot stopped flowering. Used high-nitrogen fertilizer. Asks if thats the problem for dahlias too. Deep Dive (The Long Island Gardener) 2010 summer heat waves (80-90°F) are major fac

Petunias Wilting and Dying: Water, Fungus, Drainage, and Slugs

Gardener transplanted mature petunias into Miracle-Gro soil in hanging baskets. Most failed. Tried not to disturb roots. Asks if should have cut stems/roots. Possible Causes (Mike) Transition shock: no gradual hardening

Reviving Last Year's Begonia Corms: Potting and Conditions

Brian asks how to germinate last years begonia corms. Steps (C.L.) If dried up: pot in moist potting soil, bright but not hot sun. If not too desiccated, theyll sprout. If already potted but not sprouting: warm location

Lisianthus Care: Annual for Sunny Window or Summer Garden

Judy bought a purple lisianthus, never seen it before. Asks if annual/perennial, sun needs, can it grow indoors year-round. Care Guide (C.L.) Lisianthus is an annual, blooms in summer. Indoors: bright sunny window. Outdo

Overwintering King Tut Grass (Papyrus) in Alaska: Indoor Water Culture

Alaska gardener wants to overwinter King Tut grass in containers through long, dark winter. Method (C.L.) If potted, keep in dish holding 1-2 water. If in ground, dig, pot, settle outdoors before frost. Brightest window

Black-Eyed Susan Vine Declining: Drainage and Fertilizer Fixes

Reviving Thunbergia alata with Yellowing Leaves Your vines bloomed well then declined—yellow leaves, few flowers despite fertilizer and watering adjustments. The culprit is likely poor drainage in clay soil, causing wate

Identifying Anise Hyssop (Agastache foeniculum) Seedlings

Pat has unknown plants sprouting in garden; photo provided. Identification (C.L.) Likely Agastache foeniculum (anise hyssop). Species self-seeds aggressively; cultivar Blue Fortune does not. Easy to pull; deadhead or rem

Variegated Impatiens Dropping Buds Indoors: Soil Exhaustion and Stress Factors

Violet grows variegated impatiens indoors for years. This year buds drop before opening. East sun. Saved soil outside over winter. Troubleshooting (C.L.) Bud drop = plant stress. Causes: Soil drying out or staying too w

Transplanting Shrubs and Bushes During Porch Construction: Autumn Timing and Pot Storage

Homeowner adding farmers porch (6-week project). Needs to move shrubs/bushes and replant after. Asks how to store them. Strategy (The Long Island Gardener) Autumn is perfect: plants entering dormancy, roots still active

Overwintering Begonia 'Betulia' in the UK: Indoor Care

Christopher in Milton Keynes, UK has Betulia begonia in large pot. Asks about frost protection: garage or indoors? Advice (C.L.) Begonias dont survive below 50°F/10°C. Bring indoors before nights drop that low. Easiest:

Dividing Hardy vs. Tropical Hibiscus: Timing and Methods

Tom asks when and how to divide hibiscus. Answer (C.L.) Hardy hibiscus (dies to ground): divide spring or fall. Dig clump, cut with root-pruning saw into 6-8 pieces, replant, water well. Dont fertilize until next year;

Dahlias Not Blooming: Investigating Light, Pests, and Virus Symptoms

Gardeners dahlias self-divided and spread but produced few flowers/no big blooms. Didnt lift tubers. Diagnosis (The Long Island Gardener) Dahlia season over; hard to diagnose now. Need to recall symptoms: Leaf mottling,