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Most watering guides and most pet-toxicity pages exist separately. \
You either get a light-and-water chart, or an ASPCA lookup, but never both in the same place.

This reference covers the 12 most popular houseplants. Each entry shows light level, how often to water, whether it is safe for cats and dogs per the ASPCA, and the single most common mistake owners make with that plant. All toxicity data is drawn from the ASPCA Animal Poison Control toxic-and-non-toxic plant database.

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Low-light tolerant plants
These four survive north-facing windows and darker corners. They are the most forgiving plants for beginners, but "low light" does not mean "no light". A spot with some natural daylight is still better than a dim interior wall.

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[icon:STAR] Pothos (Epipremnum aureum) | Light: low to bright indirect
[icon:CLOCK] Pothos | Water: every 7 to 10 days; let top inch dry first
[icon:HEART] Pothos | Pets: TOXIC to cats and dogs (calcium oxalate crystals)
[icon:TRENDING_DOWN] Pothos: avoid | Overwatering. Yellow leaves with mushy stems means roots are rotting
[icon:STAR] Snake Plant (Dracaena trifasciata) | Light: low to bright indirect
[icon:CLOCK] Snake Plant | Water: every 14 to 21 days; let soil dry fully between waterings
[icon:HEART] Snake Plant | Pets: TOXIC to cats and dogs (saponins cause vomiting and diarrhea)
[icon:TRENDING_DOWN] Snake Plant: avoid | Overwatering in winter; it stores water in its leaves and needs very little
[icon:STAR] ZZ Plant (Zamioculcas zamiifolia) | Light: low to medium
[icon:CLOCK] ZZ Plant | Water: every 2 to 3 weeks; one of the most drought-tolerant houseplants
[icon:HEART] ZZ Plant | Pets: TOXIC to cats and dogs (calcium oxalate crystals, all parts)
[icon:TRENDING_DOWN] ZZ Plant: avoid | Watering too often. If in doubt, skip a week
[icon:STAR] Peace Lily (Spathiphyllum) | Light: shade to medium indirect
[icon:CLOCK] Peace Lily | Water: every 5 to 7 days; wilts visibly when thirsty, then recovers fast
[icon:HEART] Peace Lily | Pets: TOXIC to cats and dogs (calcium oxalate crystals)
[icon:TRENDING_DOWN] Peace Lily: avoid | Direct sun. Leaves scorch and develop brown tips at the edges

:LINK
https://www.aspca.org/pet-care/animal-poison-control/toxic-and-non-toxic-plants
ASPCA: full toxic and non-toxic plant database for cats, dogs and horses

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Bright indirect light plants
These four thrive within 2 to 3 metres of a south or west window, behind a sheer curtain. Direct midday sun scorches their leaves. They grow faster than low-light plants and drink more in summer.

:STATS
[icon:STAR] Monstera deliciosa | Light: bright indirect; 1 to 3 m from a window
[icon:CLOCK] Monstera | Water: every 7 to 10 days; let top 3 to 5 cm of soil dry
[icon:HEART] Monstera | Pets: TOXIC to cats and dogs (calcium oxalate crystals)
[icon:TRENDING_DOWN] Monstera: avoid | Too little light; the leaf holes need good light to develop fully
[icon:STAR] Fiddle Leaf Fig (Ficus lyrata) | Light: bright indirect, consistent position
[icon:CLOCK] Fiddle Leaf Fig | Water: every 7 to 10 days; let top 3 cm dry; never let it sit wet
[icon:HEART] Fiddle Leaf Fig | Pets: TOXIC to cats and dogs (ficin latex and psoralen)
[icon:TRENDING_DOWN] Fiddle Leaf Fig: avoid | Moving it. It drops leaves in protest after a position change
[icon:STAR] Rubber Plant (Ficus elastica) | Light: bright indirect
[icon:CLOCK] Rubber Plant | Water: every 10 to 14 days in summer; every 3 weeks in winter
[icon:HEART] Rubber Plant | Pets: TOXIC to cats and dogs (ficin latex)
[icon:TRENDING_DOWN] Rubber Plant: avoid | Dusty leaves; wipe them monthly so the plant absorbs light properly
[icon:STAR] Heartleaf Philodendron | Light: low to bright indirect
[icon:CLOCK] Heartleaf Philodendron | Water: every 7 to 10 days; let top inch dry
[icon:HEART] Heartleaf Philodendron | Pets: TOXIC to cats and dogs (calcium oxalate crystals)
[icon:TRENDING_DOWN] Philodendron: avoid | Confusing it with pothos; both trail and look similar but leaf shapes differ

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Pet-safe picks and special-care plants
Only two of the twelve on this list are confirmed non-toxic to both cats and dogs by the ASPCA: spider plant and calathea. Dracaena and aloe vera are often listed as "safe" in popular articles; both are ASPCA-listed as toxic. Check before you buy.

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[icon:STAR] Spider Plant (Chlorophytum comosum) | Light: bright indirect to partial shade
[icon:CLOCK] Spider Plant | Water: every 7 to 10 days; tolerates occasional neglect well
[icon:CHECK] Spider Plant | Pets: NON-TOXIC to cats and dogs (ASPCA confirmed safe)
[icon:TRENDING_DOWN] Spider Plant: avoid | Brown leaf tips from fluoride; use filtered or distilled water
[icon:STAR] Calathea (Calathea spp.) | Light: low to medium indirect; no direct sun
[icon:CLOCK] Calathea | Water: keep soil evenly moist; water every 5 to 7 days
[icon:CHECK] Calathea | Pets: NON-TOXIC to cats and dogs (ASPCA confirmed safe)
[icon:TRENDING_DOWN] Calathea: avoid | Low humidity; curling leaves mean it needs 50% or higher humidity
[icon:STAR] Aloe Vera | Light: bright direct to bright indirect
[icon:CLOCK] Aloe Vera | Water: every 3 weeks; let soil dry completely between waterings
[icon:HEART] Aloe Vera | Pets: TOXIC to cats and dogs (aloin causes vomiting and lethargy)
[icon:TRENDING_DOWN] Aloe Vera: avoid | Treating it as cactus; it needs light but not scorching afternoon sun
[icon:STAR] Dracaena (Dracaena spp.) | Light: low to medium indirect
[icon:CLOCK] Dracaena | Water: every 10 to 14 days; let top half of soil dry out
[icon:HEART] Dracaena | Pets: TOXIC to cats and dogs (saponins; dilated pupils in cats)
[icon:TRENDING_DOWN] Dracaena: avoid | Believing it is pet-safe; it appears on many safe-plant lists incorrectly

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If your pet eats any plant marked TOXIC above, call the ASPCA Animal Poison Control Center at (888) 426-4435. Have the plant name ready before you call.

:LINK
https://www.aspca.org/pet-care/animal-poison-control/cats-plant-list
ASPCA: toxic and non-toxic plants for cats

:LINK
https://www.classyplants.com/houseplant-care-chart/
ClassyPlants: watering and care chart for popular houseplants