Photo: T.Voekler / CC BY-SA 3.0

Sacred Lotus Care

Nelumbo nucifera · Nelumbonaceae

🐾 Pet-safe 🎯 Moderate ☀️ Full sun 💧 Every 7 days

🕮 6 min read 🕓 Last reviewed: 2026-08-23

Care at a glance

Light

Full sun

Temperature

15–32 °C (59–90 °F)

Soil

a nutrient-rich aquarium substrate (or attached to wood/rock)

Difficulty

Moderate

Mature size

90–180 cm (35–71 in)

Pet safety

Pet-safe

Care effort High

The short version

A little attention keeps it happy.
Give it Full sun.
Water every 7–7 days.
Safe around cats and dogs.

The Sacred Lotus (Nelumbo nucifera) is an aquatic plant grown submerged in freshwater aquariums. It comes from Asia and is rated Moderate to keep, reaching 90–180 cm. Here is how to grow it underwater — lighting, substrate, CO₂, placement and propagation.

Also known asNelumbo nuciferaハス莲花LotoLotus sacré

📋Quick facts

Growth rate	Fast
Mature size	90–180 cm (35–71 in)
Native region	Asia
Plant family	Nelumbonaceae
Toxicity	Non-toxic
Air-purifying	No
Ideal for	homes with pets, a pop of colour, filling a corner

⚖️Pros & cons

Pros

Non-toxic to cats and dogs
Fast, rewarding growth
Flowers indoors
Big, room-defining presence

Cons

Needs high humidity to look its best
Needs a bright, sunny spot
Eventually needs plenty of room

🐟Growing it in an aquarium

Keep the water at 15–32 °C. Stable, gently moving water and regular partial water changes keep it healthy; sudden swings in temperature or chemistry cause melting.

Light

Give it Full sun-equivalent aquarium lighting. Low-tech tanks suit undemanding species; brighter light (and often CO₂) brings out the best colour and compact growth but also feeds algae, so balance it carefully.

Soil

Plant it in a nutrient-rich aquarium substrate (or attached to wood/rock). Rooted species are hungry feeders — use root tabs or a liquid aquarium fertiliser (and CO₂ for demanding types). Epiphytes like Anubias, Java fern and Bucephalandra must NOT be buried: tie or glue their rhizome to wood or rock, or they rot.

Its size and habit suit a spot in the foreground, midground or background depending on how tall it grows; trim and replant tops to keep it dense.

✂️How to propagate, step by step

Spring and early summer, during active growth, give the best success. Here is how to do it, step by step:

division at repotting

Water the plant the day before to reduce stress on the roots.
Slide it out of its pot and gently shake off the loose soil.
Tease the root ball into sections, each with healthy roots and a few shoots.
Pot each section into fresh mix at its original depth.
Water them in and keep out of direct sun for a week while they recover.

seed

Sow fresh seed onto the surface of moist, fine seed-starting mix.
Cover lightly only if the seed needs darkness; most need warmth of 20–25 °C.
Keep humid under a clear cover in bright, indirect light.
Germination ranges from days to months depending on the species — be patient.
Prick seedlings out into their own small pots once they have a few true leaves.

🔬Classification

Plant type	Aquatic plant
Genus	Nelumbo
Family	Nelumbonaceae · Nelumbonaceae
Native to	Asia

🩺Common problems

Symptom	Likely cause	What to do
Will not flower	Too little light, or it is not mature yet	Give it brighter light and be patient through a season.
Yellowing leaves	Usually overwatering or poor drainage	Let the soil dry more between waterings and make sure the pot drains.
Pests (mites, mealybugs)	Dry conditions or a new infected plant	Wipe the leaves, rinse, and treat with insecticidal soap or neem.

🩺 Plant Doctor →

🐛Pests & prevention

The usual indoor pests are spider mites (fine webbing, speckled leaves), mealybugs (white cotton-wool tufts), scale (small brown bumps), and fungus gnats (tiny flies from soggy soil). Inspect any new plant before it joins the others, wipe the leaves now and then, and let the topsoil dry to keep gnats away. At the first sign, isolate the plant, wipe or rinse off what you can, and treat with insecticidal soap or neem oil every week until it is clear.

🐾Is it safe for pets?

Good news for pet owners: the Sacred Lotus is considered non-toxic to both cats and dogs by the ASPCA. It is one of the safer choices for homes with animals, though eating any plant can still cause mild stomach upset.

Toxicity information is a general guide based on ASPCA data. If your pet or child may have eaten any part of a plant, contact a vet or poison control right away.