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Houseplant Root Supplement

Our Houseplant Root Supplement is a root supplement for houseplants, for use at repotting, transplanting and while roots recover. It supports new root development and recovery after repotting, transplanting or root loss.

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When adding this to your routine may help

  • At repotting or transplanting, while roots recover and re-establish
  • For plants that have lost roots to overwatering or a spell in poor conditions
  • When rooting cuttings or dividing plants
  • For plants that have sat in the same pot for a long time with little new root growth
  • Alongside regular feeding, while roots rebuild

Soil and root health are shaped by watering, drainage, light and season as much as by what you add, so this is one part of overall plant care.

Results you can see

Feeds foliage for deeper color and a brighter, more lively look.

Feeds foliage for deeper color and a brighter, more lively look.

Encourages fresh leaf and stem growth for a fuller, thriving plant.

Encourages fresh leaf and stem growth for a fuller, thriving plant.

Supports healthy resilient roots that absorb nutrients more effectively.

Supports healthy resilient roots that absorb nutrients more effectively.

Works for houseplants

  • Pothos
  • Monstera
  • Philodendron
  • Fiddle Leaf Fig
  • Snake Plant
  • ZZ Plant
  • Peace Lily
  • Calathea
  • Houseplant

How to use

  1. Watering can

    1 tsp per quart (32 oz) of water

    Spring & summer: every 1–2 weeks · Fall & winter: every 4 weeks

What's inside
Four ingredients, all aimed below the soil line. Sea kelp supplies natural growth-promoting compounds that support new root development — the part of your plant you never see, but the part that decides how much leaf growth your plant can afford. A 10% probiotic houseplant blend adds beneficial microbes that improve nutrient availability in the pot and help crowd out the rot organisms that take hold in soil kept too wet — a real risk in containers, where roots also need air, not just water.

Plant-derived surfactants fix the most common invisible watering problem: once potting mix dries out, it turns water-repellent, and water channels down the pot's sides and out the drainage holes while the root ball stays dry. Surfactants break that surface tension so moisture and nutrients spread evenly through the soil, and plant-derived fulvic acid helps carry minerals into the roots. There's no NPK here by design — it supplements your fertilizer rather than competing with it.

How to care for houseplants

Light

Bright, indirect light suits most of these plants: right by an east window, or a few feet back from a south one. Direct afternoon sun scorches calathea and peace lily.

Water

Water when the top inch or two of mix feels dry, until it runs from the drainage hole, then empty the saucer. Snake plants and ZZ plants want longer dry spells.

Soil

A loose, well-draining potting mix with bark or perlite in it. Aroids such as monstera and philodendron sit unhappily in dense soil that stays wet for days.

Humidity

Average room humidity suits pothos and snake plants, while calathea and fiddle leaf fig prefer 50 percent or higher. Group plants together or run a humidifier in winter.

Feeding

Houseplant Root Supplement is a root product rather than a complete feed, so use it alongside your regular houseplant fertilizer, especially around repotting, propagation and other root stress.

Repotting

Move up one pot size when roots circle the bottom, usually every one to two years in spring. Loosen the root ball and use fresh mix, not garden soil.

Frequently asked questions

How often should I use root supplement on houseplants?

Houseplant Root Supplement is meant to ride along with your regular watering rather than be a separate routine. Mix 1 teaspoon per quart of water and apply every 1–2 weeks in spring and summer, then every 4 weeks in fall and winter. Because it carries no NPK, one dilution suits every plant in the house, so you can water the whole collection from the same can without mixing per plant.

Which houseplants can I use this on?

All of them. Houseplant Root Supplement is built as one supplement for a mixed collection: pothos, philodendron, monstera, snake plants, ZZ plants, ferns, palms, peace lilies, calathea and the rest. There’s no NPK in the formula, so there’s no risk of giving a light feeder more fertilizer than it wants. The kelp, probiotics, surfactants and fulvic acid do the same work at root level regardless of what is growing above the soil.

Is this a fertilizer? Do I still need plant food?

It’s a supplement, not a fertilizer; there is no NPK in it. Houseplant Root Supplement carries kelp for new root growth, a probiotic blend of beneficial microbes, plant-derived surfactants so water soaks in evenly, and fulvic acid to help carry minerals into the roots. Those build root health and improve how well roots take up water and nutrients, but your plants still need actual nutrition from a fertilizer. The two work together: this makes the root system better at using what your plant food delivers.

Why does water run straight through my plant's pot?

Peat-based potting mixes turn water-repellent once they dry out fully. Water beads on the surface, slides down the gap between soil and pot, and exits the drainage holes while the root ball stays dry. The plant-derived surfactants in Houseplant Root Supplement break that surface tension so moisture and nutrients spread evenly through the soil again. For a badly dried pot, bottom-water once to rewet it thoroughly, then resume normal watering with the supplement mixed in.

Can this help a plant recover from overwatering or root rot?

It supports the rebuild, but fix the cause first. Rot means the soil has stayed wet too long, so trim mushy roots back to firm tissue, repot in fresh, well-draining mix if the damage is extensive, and let the soil dry more between waterings; roots need air as well as water. From there, the probiotics in Houseplant Root Supplement help beneficial microbes establish in the fresh mix, and the kelp supports the new root growth your plant needs to recover.

When will I see results?

Roots recover before the leaves show it. Within 2–4 weeks of regular use, expect pots that rewet easily when watered instead of shedding water, and plants that hold steady rather than declining. Visible growth follows in the growing season, typically 4–8 weeks, as rebuilt root capacity turns into new leaves. Slow growers like ZZ and snake plants take longer to show a change than pothos or philodendron, so judge them on a longer timeline.

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Houseplant Root Supplement 8oz $11.99