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Mark Tavis

Mark Tavis is the pen name of Plant Blueprint's founder and editor, a plant enthusiast and researcher (not a professional horticulturist). Every guide is built from university extension services, botanical gardens and the ASPCA, with sources linked so readers can check them.

Rice Water for Plants: What the Research Shows

October 9, 2026 by Mark Tavis
Rice water for plants: a glass jar of cloudy rice rinse water next to a bowl of uncooked rice and a potted pothos

The Pantry | Myth Check Rice water for plants does contain real nutrients, but it is a mild supplement, not a replacement for fertilizer. In … Read more

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Coffee Grounds for Houseplants: What Research Really Says

October 22, 2026October 8, 2026 by Mark Tavis
Coffee grounds for houseplants: used coffee grounds in a bowl next to a potted pothos on a kitchen counter

The Pantry | Myth Check Used coffee grounds for houseplants are not a good fertilizer when you add them straight to the pot. Researchers at … Read more

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Christmas Cactus Not Blooming? 6 Causes and the 6-Week Fix

October 21, 2026October 8, 2026 by Mark Tavis
Christmas cactus not blooming: healthy green stem segments with no flowers on a bright windowsill

The Infirmary | Bloom Diagnosis A Christmas cactus that won’t bloom is almost always missing its fall signal: long, dark nights and cool temperatures. According … Read more

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Water Lily vs Lotus: How to Tell Them Apart (and Grow One)

October 26, 2026October 5, 2026 by Mark Tavis
Water lily vs lotus: floating water lily pads beside an emergent lotus flower and its cone-shaped seed pod

The Infirmary | Water Lily vs Lotus In a pond in July the two plants can look alike: round leaves, big flowers that open in … Read more

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Scindapsus pictus Care: Light, Water and Is It Cat Safe?

October 24, 2026October 1, 2026 by Mark Tavis
Scindapsus pictus care satin pothos with silver-splashed heart-shaped leaves in bright indirect light

The Lab | Scindapsus pictus Care Hold a Scindapsus pictus leaf up to a window and the silver splashes look hand painted, which is what … Read more

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Monstera Deliciosa Care: Light, Water, Soil and Moss Poles

October 24, 2026September 30, 2026 by Mark Tavis
Monstera deliciosa care guide: large split-leaf houseplant climbing a moss pole in bright indirect light

The Lab | Monstera Deliciosa Care Monstera deliciosa, the Swiss cheese plant, has a reputation for being fussy that it doesn’t deserve. In a bright … Read more

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Maidenhair Fern Care: How to Stop It Drying Out Indoors

October 23, 2026September 30, 2026 by Mark Tavis
Maidenhair fern care guide: delicate fan-shaped leaflets on wiry dark stems in bright indirect bathroom light

The Lab | Maidenhair Fern Care Maidenhair ferns look like a cloud of green lace in the shop and often turn brown and crispy within … Read more

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Tradescantia Nanouk Care: Light, Water and Propagation

October 19, 2026September 28, 2026 by Mark Tavis
Tradescantia Nanouk care guide: pink, purple, and green striped trailing houseplant in a bright windowsill pot

The Lab | Tradescantia Nanouk Care Tradescantia Nanouk care has a reputation for being effortless, and most of that reputation holds. The thick, pink-flushed stems … Read more

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Aphids on Indoor Plants: How to Get Rid of Them for Good

October 22, 2026September 27, 2026 by Mark Tavis
Aphids on indoor plants clustered on the underside of a houseplant leaf

The Infirmary | Aphids on Indoor Plants A new leaf that opens curled, a sticky shine on the foliage, or ants walking up the pot: … Read more

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