Echinodorus 'Red Flame' (Red Flame sword) care

Light

Echinodorus 'Red Flame' is what florists mean by "bright spot, no direct sun" — close enough to a south or east window to feel the brightness, with a sheer curtain or a few feet of distance keeping the sun off the leaves. Bright aquarium light brings out the red colouration; under low light it stays mostly green. CO2 optional but enhances size and pigment intensity. A phone lux-meter at the leaf surface should read 1,500-3,000 lux at noon.

Watering

Water echinodorus 'red flame' permanently submerged; 25-30% weekly water change. The actual day count varies with pot size, light, and season — the finger test (or lifting the pot to feel its weight) is more reliable than a fixed calendar. Empty any drainage saucer afterwards so the pot isn't sitting in water. Fully aquatic — keep crown and foliage underwater. Adapts to soft to moderately hard water, pH roughly 6.5-7.5; stable, clean water supports the best colour.

Soil and pot

Echinodorus 'Red Flame' grows best in deep, nutrient-rich aquarium substrate with root tabs. A heavy root feeder. A deep aqua-soil or gravel bed with iron-rich root tabs is essential to drive growth and the red pigmentation. A pot with a working drainage hole is non-negotiable for this species — even free-draining mix will turn soggy in a closed planter. If you love the look of a decorative pot without a hole, use it as a cachepot around an inner nursery pot you can lift out to water.

Humidity and temperature

Echinodorus 'Red Flame' sits happiest at around 100% (submerged) humidity and 22-28°C (72-82°F). Grown underwater so ambient humidity is irrelevant; emersed propagation needs a humid, enclosed environment. If you keep the room above 22 year-round and avoid placing the plant near a cold draught, a hot radiator, or an air-conditioning vent, you have already handled the two biggest indoor stressors.

Fertilising

Feed echinodorus 'red flame' sparingly. Iron is the key driver of red colour — use iron-rich root tabs every 2-3 months plus a weekly liquid iron/trace fertiliser. Without ample iron the leaves stay green and may pale. Skip fertiliser entirely on a stressed, recently-repotted, or actively wilting plant — fertiliser salts make damage worse, not better. Wait for a round of healthy new growth before resuming a feeding rhythm.

Common problems

Below are the issues we see most often on echinodorus 'red flame' in the Growli community. Each is annotated with the most common cause so you know where to start.

• Loss of red colour — Low light and iron deficiency revert leaves to green. Raise lighting and dose iron heavily via root tabs and liquid iron.
• Pale, translucent new leaves — Iron shortage in lean substrate. Increase root-tab iron and trace-element dosing.
• Holey, melting old leaves — Potassium deficiency or normal turnover. Trim spent leaves and supplement potassium.
• Submersion melt — Emersed-grown nursery leaves die back when planted; the crown survives and regrows red-toned submerged leaves in a few weeks.

Propagation

Propagate from plantlets on its flower/runner stalks; once each plantlet is rooted with several leaves, separate and replant — colour develops as they mature under good light. Propagation is the cheapest, most satisfying way to expand a collection — and it doubles as insurance against losing a mature plant to an accident. Take a backup cutting once the parent is established and healthy.

Toxicity to pets

Echinodorus 'Red Flame' is mildly toxic to pets. Echinodorus is not individually listed by the ASPCA, so its status is unconfirmed; treat with caution and verify with a vet. The genus is reported by some sources to contain saponins, so do not assume pet-safe — keep trimmed leaves out of reach of cats and dogs. If you keep cats, dogs, or curious children in the house, weigh placement carefully — a high shelf or a hanging planter is enough for casual safety. For severe ingestion incidents, call your local vet and the ASPCA Animal Poison Control Center (in the US, 888-426-4435).

Pet-safety status is sourced from the ASPCA Toxic and Non-Toxic Plant List, which catalogues the most-asked-about plants for cats, dogs, and horses.

Echinodorus 'Red Flame' deep-dive guides

Every aspect of echinodorus 'red flame' care, each with its own calibrated guide:

• Echinodorus 'Red Flame' watering schedule
• Echinodorus 'Red Flame' light requirements
• Best soil mix for echinodorus 'red flame'
• Echinodorus 'Red Flame' fertilizing guide
• When to repot echinodorus 'red flame'
• How to propagate echinodorus 'red flame'
• Echinodorus 'Red Flame' growth rate & size
• Echinodorus 'Red Flame' cold hardiness
• Echinodorus 'Red Flame' temperature & humidity
• Is echinodorus 'red flame' toxic to cats & dogs?
• Is echinodorus 'red flame' toxic to cats?
• Is echinodorus 'red flame' toxic to dogs?

Featured in these plant shortlists

Echinodorus 'Red Flame' qualifies for 1 curated Growli shortlist — each one filtered objectively from our structured plant-care library, so the selection is consistent and checkable:

• Best plants for a north-facing window — Houseplants for a north-facing window: bright, even, indirect light and no scorching direct sun. Each pick verified against its documented light needs.
• Browse all 29 plant shortlists — pet-safe, low-light, drought-tolerant and more

Related guides

Echinodorus 'Red Flame' is also commonly called Red Flame sword or red Amazon sword.

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