Horticultural Myths

Looking for the newest myth-information? Check out our blog The Garden Professors. You'll find science-based information from four horticultural professors from around the country.

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Fertilizers

Bone meal

Fertilizer injection

Foliar fertilizers

Phosphate

Part 1
Part 2: Roses and phosphate
Part 3: Red leaves and phosphate

Seaweed extracts

How plants work

Antitranspirants

Cold hardiness and magnesium/potassium

Drought-tolerant plants

Invasive species

Leaf wilt and water

Light and flowering

Plant size and nursery tags

Thigmomorphogenesis

Topping young trees

Maintaining trees and shrubs

Disinfecting pruning tools

Irrigation and dormancy

Native plants

Plant quality

Pruning new transplants

Tree topping

Vibration and soil compaction

Water drops and sunlight

Wound dressings

Mulches

Bark and sawdust

Dust mulches (Literature)

Landscape fabric

Newspaper and cardboard sheet mulches

Rubber mulch

Wood chips

Arborist wood chips (Literature)
Cedar woodchips
Uncomposted wood chips

Yard waste

Pesticides

Bacillus thuringiensis (Bt) (Literature)

Baking soda (Literature)

Botanicals

Compost tea

Part 1
Part 2
Part 3 (EPA statement about pesticidal use of compost tea)
Part 4 (Literature)

Corn gluten meal

Glyphosate

Harpin

Horticultural oils (Literature)

Milk sprays

Planting techiques

Aeration tubes

Instant landscaping

Nursery brochures

Pressure treated lumber

Root balls, part 1

Root balls, part 2

Staking

Timing of planting

Vitamin B-1

Wire baskets

Scientific literacy

Biodynamics

Companion plants

Credible information

Ecoterrorism

Old horticulturalist tales

Organic superiority

Soil amendments

Coffee grounds (Literature)

Container drainage

Epsom salts (Literature)

Gypsum

Organic matter

Part 1
Part 2: Compost
Part 3: Nutrient overload
Part 4: Water quality issues

Peat moss

Polyacrylamide gels

Part 1
Part 2
Part 3 (Literature)

Sand