Anthurium Seedling Care: The First 60 Days

Young anthuriums are tougher than people expect. Most seedling losses come from too much attention in the first two weeks: repotting into dense soil, overwatering, or moving them around trying to find the perfect spot. Here is the routine we use on our own seedlings.

Day one: unbox and look

Open the box as soon as it arrives. If anything is crushed, snapped or frozen, take photos of the plant and the box before you repot. Most sellers, us included, need those photos to replace a plant.

A little travel stress is normal. A yellowing lower leaf, a bent petiole or slight wilting usually recovers within a couple of weeks once the plant settles. Do not cut off a yellow leaf right away. The plant is still pulling energy from it.

Potting

Use a small pot. A seedling on its first to third leaf belongs in something like a 2 to 3 inch pot. A big pot holds more wet substrate than the roots can use, and that is how root rot starts.

Anthurium roots want air as much as water, so skip regular potting soil. A chunky aroid mix works. Semi-hydro is what we use for everything from germinating seed to mother plants, in The Dirty Bowtie, which is calcined clay, biochar, vermiculite and perlite. Rinse the old media off the roots gently and pot straight in.

Light

Bright, indirect light. A spot near an east window, or a few feet from a south or west window, works in most homes. Under grow lights, keep them far enough away that new leaves do not bleach or crisp. Pick a spot and leave the plant there. Constantly moving a seedling slows it down.

Humidity and temperature

Seedlings like humidity, ideally 60 percent or higher, and warm temperatures in the 65 to 85°F range. A clear tote, a cabinet or a simple humidity tent helps a lot in dry climates. Give it some airflow so it is not sitting in stale air. Avoid cold drafts and heating vents.

Watering

In a chunky aroid mix, water when the top of the mix starts to dry. Do not let a small seedling go bone dry.

In semi-hydro, keep some solution in the reservoir or tray and let it run dry before you refill. That dry spell pulls oxygen down to the roots. Use filtered or low mineral water if your tap water is hard.

Feeding

Feed lightly and often rather than heavily and rarely. A balanced fertilizer at a quarter to half of the label strength with most waterings is plenty for a seedling. Flush with plain water every few weeks so salts do not build up.

What to expect

For the first couple of weeks, not much. The plant is growing roots. After that, a healthy seedling puts out a new leaf every few weeks, and each leaf is usually larger and closer to the adult shape. Dark hybrids often open red, bronze or chocolate and harden darker over several days. That colour change is normal.

Common questions

Why are the new leaves smaller than the old one?

Usually root stress from shipping or repotting. Give it a few weeks. Sizes recover once roots establish.

Should I put it in a cabinet right away?

If your home is dry, a cabinet or tent is the single biggest help. Acclimate it slowly if you later move it out to room humidity.

Are anthuriums safe for pets?

No. Anthuriums are toxic if eaten. Keep them away from pets and children.

Looking for your next one? See our current seedlings, or read how to pick a seedling seller.