Evidence-Based Plant Care
Find out what your houseplant needs. Start with its symptoms and growing conditions.
Explore care guides for 738 plants and a knowledge base of 4,889 records. Check the likely causes before choosing a fix.
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From the Knowledge Base
Articles
best potting mix for indoor plants · 14 sources
Best potting mix for indoor plants: match the mix to the plant
Which potting mix suits tropical foliage, aroids, cacti, orchids, African violets and ferns, what 'organic' on the bag means, and how peat and peat-free mixes differ. From extension and RHS guidance.
Oct 15, 2026 Read →
common bromeliad problems and solutions · 6 sources
Common bromeliad problems and solutions: dying after flowering, brown tips, rot and pests
Why a bromeliad declines after it blooms, and how to tell normal ageing from crown rot, brown tips, scale, mealybugs, too much or too little light, salt build-up and cold damage. Checks and fixes from Clemson, UF/IFAS, NC State, UW–Madison and Colorado State Extension.
Oct 15, 2026 Read →
strelitzia reginae vs nicolai · 6 sources
Strelitzia reginae vs nicolai: orange vs white bird of paradise indoors
How to tell orange bird of paradise (Strelitzia reginae) from white bird of paradise (S. nicolai) by flower, leaf size and trunk, and how they differ indoors in light, size, flowering, watering, split leaves and pet safety. From NC State, Clemson, UF/IFAS, the RHS and the ASPCA.
Oct 15, 2026 Read →
zz plant vs money tree · 9 sources
ZZ plant vs money tree: light, watering, size and pet safety compared
ZZ plant (Zamioculcas zamiifolia) stores water in rhizomes and tolerates dim rooms; money tree (Pachira aquatica) is a fast tree that wants brighter light and more humidity, and the ASPCA lists it as non-toxic. Side-by-side from NC State, UF/IFAS, Iowa State, Clemson, NYBG, the RHS and the ASPCA.
Oct 15, 2026 Read →
chinese evergreen · 7 sources
Chinese evergreen varieties: 18 types of Aglaonema compared, from Maria and Silver Bay to Siam Aurora
Eighteen Chinese evergreen (Aglaonema) species and cultivars compared by leaf pattern, size and light tolerance: A. commutatum and Maria, A. modestum, A. nitidum Curtisii, the UF/IFAS Bay series, and red and pink types such as Siam Aurora. From NC State Extension and UF/IFAS.
Oct 14, 2026 Read →
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Pothos
Popular Epipremnum aureum
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Monstera deliciosa
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Strelitzia reginae
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Crassula ovata
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Peperomia
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Parlor palm
Chamaedorea elegans
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Codiaeum variegatum
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Pilea peperomioides
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Air plant
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Monstera adansonii
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Alocasia Frydek
Alocasia micholitziana 'Frydek'
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String of hearts
Ceropegia woodii
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Money tree
Pachira aquatica
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Begonia maculata
Begonia maculata
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Chinese evergreen
Aglaonema
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Blueberry
Vaccinium
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Calathea orbifolia
Goeppertia orbifolia
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Schefflera
Heptapleurum
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Syngonium
Syngonium podophyllum
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Scindapsus pictus
Scindapsus pictus
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Christmas cactus
Schlumbergera
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Venus flytrap
Dionaea muscipula
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Oxalis triangularis
Oxalis triangularis
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Kalanchoe
Kalanchoe blossfeldiana
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Sourced guides
Houseplant care guides
- 7 easy indoor plants for beginners, matched to your light and pets
- Acclimating tissue-culture plantlets: deflasking, humidity domes and hardening off, with anthurium as the example
- African violet care (Streptocarpus ionanthus): light for reblooming, watering, potting and grooming
- African violet grow lights: LED vs fluorescent and a usable setup
- Air plant water: rainwater, tap, softened or distilled?
- Alocasia care: watering, leaf loss, dormancy and corm checks
- Alocasia dormancy: winter rest, checking the corm and bringing it back into growth in spring
- Alocasia Silver Dragon care (Alocasia baginda): light, watering, humidity and winter rest
- Alocasia varieties: 16 types of elephant ear compared, from Polly and Frydek to Black Velvet and Silver Dragon
- Aloe arborescens vs aloe vera: how to tell them apart, size, frost and safety
- Aloe types for indoors: 8 aloes compared, from aloe vera to tiger tooth, lace aloe and fan aloe
- Aloe vera latex (aloin): how it differs from the gel, and why the FDA pulled aloe laxatives
- Aloe vera turning red or brown: sun stress, cold, drought or roots?
- Anthurium clarinervium care: light, watering, humidity and an airy mix
- Anthurium crystallinum care: big velvet leaves, warmth, watering and leaf spot
- Anthurium varieties: flowering and velvet-leaf types compared, from flamingo flower to clarinervium
- Aphids on houseplants: identify them, clean off honeydew and sooty mould, and control them
- Bathroom plants: 13 houseplants for humid, low-light bathrooms, and why light matters more than steam
- Bedroom plants: how to choose for your light, space and pets (13 options compared)
- Begonias for hanging baskets: 8 trailing varieties, from tuberous and Boliviensis types to Dragon Wing
- Best Free Plant Care Apps in 2026: What Is Actually Free?
- Best PictureThis Alternatives in 2026
- Best Plant Community and Care-Tracking Apps in 2026
- Best Plant Diagnosis Apps in 2026: Free and Paid Compared
- Best plant food for houseplants: how to choose a fertilizer by label and format
- Best Plant Identification Apps With Care Tips in 2026
- Best Planta Alternatives for Diagnosis and Plant Care in 2026
- Best potting mix for indoor plants: match the mix to the plant
- Bird of paradise care indoors (Strelitzia reginae and S. nicolai): light, water, flowering and problems
- Bonsai Pruning Techniques: An Extension-Backed Beginner Guide
- Boston fern care (Nephrolepis exaltata): light, watering, humidity and brown fronds
- Boston fern in the bathroom: what the humidity fixes and what it doesn't
- Boston fern soil keeps drying out? Check the roots, the mix and the spot
- Bringing a houseplant home: buying checks and a useful first-month plan
- Brown Spots on Houseplant Leaves: A Pattern-Based Diagnosis
- Cactus soft or wrinkled? How to tell rot from thirst, cold and stretching
- Calathea (Goeppertia) care: light, water quality, humidity and brown edges
- Calathea types: 11 prayer plant species compared, from orbifolia and peacock to rattlesnake, plus Stromanthe, Ctenanthe and Maranta
- Calathea vs maranta: how to tell the two prayer plants apart, and how their care differs
- Cast iron plant care (Aspidistra elatior): low light, watering, repotting and leaf problems
- Cheap houseplants that last: a budget plan for easy plants, free cuttings and the full cost
- Chinese evergreen care (Aglaonema): light, watering, cold damage and leaf problems
- Chinese evergreen varieties: 18 types of Aglaonema compared, from Maria and Silver Bay to Siam Aurora
- Common bromeliad problems and solutions: dying after flowering, brown tips, rot and pests
- Common houseplant care mistakes: 11 habits to change and what to do instead
- Croton Light Requirements: How Many Lux Does It Need Indoors?
- Do houseplants clean indoor air? What the 1989 NASA study tested and what later reviews found
- Does a Monstera need a moss pole? Support, aerial roots and bigger leaves
- Dracaena varieties: 13 types compared, from corn plant and Janet Craig to dragon tree, lucky bamboo and snake plant
- Dracaena vs Chinese evergreen: how to tell them apart, and how their care differs
- Edema in Houseplants: Identify the Bumps and Stop New Damage
- Fast-growing houseplants: 12 plants NC State rates as rapid growers, and what "fast" depends on
- Ficus varieties: 13 indoor ficus compared, from fiddle-leaf fig and rubber plant to weeping fig, Alii and ginseng ficus
- Fiddle-leaf fig care (Ficus lyrata): light, watering, leaf drop and brown spots
- Fiddle-leaf fig watering: how often, dry peat that won't rewet, and what tap water really does
- Flowering houseplants: what makes 8 popular bloomers flower again
- Fungus gnats in houseplants: life cycle, drying the mix, sticky cards and Bti
- Grow Light Distance and Duration for Houseplants: A Setup Guide
- Grow lights for indoor plants compared: LED vs fluorescent vs incandescent vs HID
- Grow Lights for Low-Light Apartments: A Room-by-Room Setup
- Grow Lights for Monstera, Alocasia, and Pothos
- Hanging plants for indoors: 11 trailing houseplants by light level, with watering tips for hanging pots
- Houseplant care calendar: what to change each season, from winter rest to bringing plants back indoors
- Houseplant care in winter: light, watering less, feeding, humidity, cold windows and dormant plants
- Houseplant comparisons: how to compare plants by light, water, size and pets
- Houseplant edema: what blisters and corky spots can tell you
- Houseplant fertilizer schedule: how often to feed, when to stop, and signs of too much
- Houseplant humidity: measure your room and choose a practical response
- Houseplant light requirements: a chart of 45 indoor plants by low, medium and bright light
- Houseplant nutrient deficiency signs: read old vs new leaves, then rule out roots, pH, salts and light
- Houseplant pests: identify spider mites, mealybugs, scale and more, then treat from least toxic up
- Houseplant propagation methods: stem, leaf and leaf-vein cuttings, division, offsets and layering
- Houseplant root rot causes: Pythium, Phytophthora, wet mix and how to prevent it
- Houseplant Root Rot: Signs, Root Check, and Recovery Steps
- Houseplant sunburn and leaf scorch: what it looks like, why moved plants burn, and how to acclimate them
- How often to water a snake plant: the real range, and why the mix decides
- How to prune houseplants: when to cut, where to cut, pinching, leggy vines and plants not to cut back
- How to save a dying houseplant: check roots, water, light, pests and temperature
- How to water houseplants: when to water, how much, and wet vs dry wilting
- Hoya care (Hoya carnosa and common wax plants): light, watering, flowering and problems
- Hoya varieties: 14 types of hoya compared, from carnosa and Krimson Queen to kerrii and bella
- Humidifiers for houseplants: a buyer's guide to types, white dust, cleaning and placement
- Indoor fern types: Boston, maidenhair, bird's nest, staghorn and 6 more compared, with care and pet safety
- Indoor palm types: parlor, bamboo, kentia, areca and lady palms compared, plus ponytail and sago
- Indoor succulent care: light, watering, gritty mix, pots, winter rest and propagation
- Jade plant care (Crassula ovata): sun, watering by season, soil, repotting and leaf drop
- Kalanchoe varieties: 9 types of kalanchoe compared, and how to make the florist kalanchoe rebloom
- Large indoor plants: 18 tall floor plants by light level, size indoors and pet safety
- Leaf spot on houseplants: fungal or bacterial, and what is not a disease
- LECA vs soil for houseplants: water, air, nutrients, salts and which to choose
- Low light houseplants: 12 plants for north windows and dim rooms, with pet safety
- Mealybugs on houseplants: find them, check the roots, and treat from alcohol swab up
- Mold on Houseplant Soil: Identify It Before You Treat It
- Money tree care (Pachira aquatica): light, watering, braided trunks and leaf drop
- Monstera 'Thai Constellation' care and problems: light, watering, brown spots on the cream sections, yellow leaves and root rot
- Monstera deliciosa care: light, watering, support, repotting and problems
- Monstera deliciosa vs Monstera adansonii: how to tell them apart, and how their care differs
- Monstera types and varieties: deliciosa, Thai Constellation, Albo, adansonii, siltepecana and rarer species compared
- Monstera watering: is it thirsty, or is the mix staying wet?
- Moving houseplants outdoors for summer: night temperatures, hardening off, wind, rain, pests and bringing them back in
- Neem oil for houseplants: what it is, which pests it controls and how to use it safely
- Neem oil vs insecticidal soap: how each works, which pests, and which plants they can burn
- Office plants: 13 plants that cope with fluorescent light, dry air and weekends alone
- Orchid types for beginners: 7 indoor orchids compared, from moth orchids to slipper, dancing lady and jewel orchids
- Overwatered or Underwatered Plant? Use Soil and Root Evidence
- Peace lily and air purification: what the NASA study measured for Spathiphyllum
- Peace lily care (Spathiphyllum): light, watering, feeding, repotting and problems
- Peace lily not blooming? Light, plant age, feeding and why shop plants flower
- Peace lily vs snake plant: how they differ in light, watering, flowers and pet safety
- Peperomia varieties: 15 types of peperomia compared, from baby rubber plant to string of turtles
- Pet-safe houseplants by light: plants the ASPCA lists as non-toxic to cats and dogs
- Philodendron care: light, watering and problems for climbing and self-heading types
- Philodendron varieties: 13 types compared, from heartleaf and Brasil to Pink Princess and selloum
- Philodendron vs rubber plant: how they differ in growth, light, watering and pet safety
- Philodendron vs snake plant: how two beginner houseplants differ in light, watering and growth
- PictureThis vs Planta vs PlantGrail: Features and Prices (2026)
- Pilea care: Chinese money plant, aluminum plant and friendship plant
- Plant doctor flowchart: houseplant symptoms, likely causes and what to check
- Plant Humidifier Cleaning, Water Choice, and White Dust
- Plants for south-facing windows: 10 houseplants for direct sun, and how to move them without scorch
- Pothos care (Epipremnum aureum): light, watering, pruning and common problems
- Pothos propagation step by step: rooting cuttings in water or mix, single nodes and layering
- Pothos varieties: every common type compared, and the "pothos" that are not Epipremnum aureum
- Pothos vs philodendron: how to tell them apart, and how their care differs
- Potting soil vs compost for houseplants: can you use compost or garden soil?
- Powdery mildew on houseplants: why it appears indoors and how to stop it
- Prayer plant care (Maranta leuconeura): yellow leaves, curling and brown tips
- Rattlesnake plant brown edges and tips: dry air, water, salts or sun?
- Rex begonia leaf cuttings: leaf-vein, wedge and square cuttings step by step
- Rubber plant care (Ficus elastica): light, watering, leaf drop and propagation
- Scale insects on houseplants: soft vs armored scale, honeydew, and how to treat them
- Small indoor plants: 14 compact houseplants for desks and shelves, by light and pet safety
- Snake plant care (Dracaena trifasciata): light, watering, repotting and root rot rescue
- Snake plant mushy at the base: rhizome rot, what to save and when to discard
- Snake plant varieties: 16 types compared, from Laurentii and Moonshine to cylindrica and whale fin
- Snake plant vs ZZ plant: how to tell them apart, and how their care differs
- Soil science for houseplants: how potting mix holds water and air
- Spider Mites on Houseplants: Confirm Them and Break the Cycle
- Spider plant care (Chlorophytum comosum): light, water, brown tips and babies
- Spider plant propagation: rooting plantlets, dividing the clump, and why a plant makes no babies
- Spider plant root rot: how to tell, what to cut and when to start again
- Spider plant vs pothos: how to tell them apart, and how their care differs
- Strelitzia reginae vs nicolai: orange vs white bird of paradise indoors
- String of hearts watering: soak, let it dry, and ease off in winter
- String of pearls vs string of bananas vs string of hearts: 5 trailing succulents compared, plus string of turtles and burro's tail
- Tap Water for Houseplants: Chlorine, Fluoride, Hard Water, and Brown Tips
- Terracotta vs plastic pots: drying, weight, salts and which plants suit each
- Terrarium plants: what grows in a closed terrarium, what needs an open one, and how to build it
- Thrips on houseplants: identify silvery damage, use sticky cards, and break the soil-stage cycle
- Toxic houseplants for cats and dogs: what each one contains and the signs to watch for
- Tradescantia varieties: inch plant types compared, from zebrina and fluminensis to purple heart and white velvet
- Types of air plants: common Tillandsia species compared, and how to water each
- Types of begonias: cane, rex, rhizomatous, tuberous, wax and Rieger compared, with care for each group
- Types of cactus for indoors: 9 desert and forest cacti compared, from pincushion and golden barrel to Christmas and Easter cactus
- Types of succulents for indoors: 10 succulent groups compared by light and size, from echeveria and haworthia to jade and string of pearls
- Types of yucca plants: 9 species, which grow indoors, and how to tell them apart
- Watering houseplants while away: a plan and caretaker card
- What is a money plant? Five different plants share the name, and how to tell them apart
- When to repot a houseplant: 8 signs to check, and how to repot step by step
- Where to Put a Plant Humidifier: Placement and Room Size
- Whiteflies on houseplants: identification, honeydew, sticky cards and control
- Why Houseplant Leaves Curl, Crisp, or Wrinkle: A Diagnostic Guide
- Why Houseplant Leaves Turn Yellow: A Decision Tree That Starts With Evidence
- ZZ plant care guide: rhizome watering, potting mix, repotting and propagation
- ZZ plant vs money tree: light, watering, size and pet safety compared
- ZZ plant watering: let the mix dry out, not the calendar decide
THE OBSERVATORY
We don't guess.
We observe.
Every recommendation on Plant Grail is backed by real case data — observed outcomes, not recycled advice. This is plant care with footnotes.
4,889
CASES ANALYZED
738
SPECIES COVERED
23
MYTHS OVERTURNED
92.4%
PANEL ACCURACY
HOW WE BUILD THE KNOWLEDGE BASE
01
Research ingestion
Peer-reviewed studies, botanical databases, and published field guides — cross-referenced and indexed.
PUBMED · BOTANICAL JOURNALS
02
Community case analysis
Thousands of documented plant problems with photos, conditions, and outcomes — mined for real patterns.
CASE DATA · PATTERN MINING
03
Protocol synthesis
Each diagnosis maps cause → solution → prevention. Every claim traces back to a source.
GRAIL ENTRIES · SOURCED
EVIDENCE-FIRST
Every diagnosis links back to real data.
We cross-reference peer-reviewed research with thousands of documented plant cases. When we say "overwatering," we've traced it across the data — not guessed from a blog post.
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Question 4 of 5
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Question 5 of 5
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