Ferns go downhill fast when the soil turns into a bug nursery or the potting mix starts throwing the balance off. This simple sick fern remedy gives you one old-school soil flush to try, plus a separate match trick for worm-infested soil when that’s the actual problem. It takes minutes, not a whole weekend of plant drama (your fern has done enough of that already).
Making a small batch yourself costs very little compared to replacing a struggling fern or buying specialty plant treatments you may not need. Using a plain salt-and-water mix also lets you control the strength exactly as written and treat only the affected pot instead of reaching for a broader product first.
You’ll need just 2 materials for the main remedy, and the alternate worm-in-soil method uses one more everyday item. The liquid treatment makes about 6 pints, so you’ll want a container or bowl large enough to mix it and something handy for pouring it into the pot without sloshing it everywhere.
- 🧰 Materials You'll Need
- 🔧 Tools & Equipment
- 🛠️ How to Make and Use the Remedy
- 🎨 Customization Ideas
- 🛠️ How to Tell Which Problem You Have
- 🛡️ Safety and Plant Care Notes
- 📦 Storage
- 💸 Estimated Cost
- 🛍️ Need Help Finding Everything?
- ❓ Frequently Asked Questions about Sick Fern Remedy
- 📌 Love this Sick Fern Remedy? Pin it!
- 🖨️ Print-Friendly How-To: Sick Fern Remedy
Materials You’ll Need
- 1/2 cup salt
- 6 pints lukewarm water
- 4 to 6 matches, for worm-infested soil
Tools & Equipment
- Large bowl, pitcher, or container for mixing
- Spoon for stirring
- Watering can or pourable container, if needed
How to Make and Use the Remedy
- Measure 1/2 cup salt and 6 pints lukewarm water into a large container.
- Stir until the salt is mixed with the water.
- Use the mixture on the sick fern’s soil as your basic remedy.
- If your fern is worm infested, use the alternate treatment by sticking 4 to 6 matches, sulfur end first, into the soil.
- Check the plant over the next several days to see whether the pest problem settles down and whether the fern begins to recover.
Customization Ideas
- For one small fern: Mix the full batch as written, then use only what the pot actually needs instead of flooding a small container.
- For several affected ferns: Keep the original ratio the same and mix separate batches as needed rather than guessing at a stronger solution.
- For mixed houseplant collections: Use this remedy on the fern that needs it and keep other plants separate while you watch for signs of soil pests. If more than one plant is struggling, you may also want to compare it with this Sick Houseplant Treatment.
How to Tell Which Problem You Have
This post actually gives you two different remedies, and that matters. The salt-and-water mix is the main treatment. The matches are a separate tip specifically for a fern that is worm infested.
If you see tiny dark flies hovering around the pot, the issue may be fungus gnats rather than worms. Houseplant experts note that fungus gnats are most common in soil that stays continuously wet, and letting the soil dry to the appropriate level between waterings helps reduce them, along with sticky traps and fresh soil when needed. You can read that guidance in this helpful houseplant pest overview from University of Minnesota Extension.
Safety and Plant Care Notes
- Use the match method only by placing the matches into the soil, sulfur end first, as written.
- Keep matches away from children, pets, and open flame.
- Do not increase the salt amount beyond the stated ratio.
- If the fern’s condition keeps getting worse, remove any dead growth and reassess light, watering, and drainage before repeating anything.
- Quarantine a struggling fern from other houseplants if you suspect pests are spreading through your collection.
Storage
Mix this remedy when you plan to use it. If you have leftover liquid, label it clearly and keep it out of reach of children and pets until you use it up or discard it.
Estimated Cost
The consumable cost for one batch is approximately $0.03 to $0.07, depending on the salt you use. A 26-ounce canister of plain table salt currently runs about $0.94 to $1.86, and this remedy uses only 1/2 cup. The optional matches add only a few cents more.
🛍️ Need Help Finding Everything?
Frequently Asked Questions about Sick Fern Remedy
You can use it on a sick fern when you want to try the remedy exactly as written, but it’s smart to start with one affected plant instead of treating every fern you own at once. Different fern varieties react differently to stress, and the bigger issue is often watering, drainage, or pests in the soil.
No. They’re listed as a separate tip for worm-infested ferns. The main remedy is the salt mixed with lukewarm water, and the matches are an alternate treatment when worms in the soil are the specific problem.
Use standard household matches with a sulfur tip, since the directions say to place the sulfur end into the soil. You only need 4 to 6 matches for the worm-infestation method.
No. Stick with the stated ratio of 1/2 cup salt to 6 pints lukewarm water. Stronger is not automatically better, especially with houseplants, and guessing your way upward usually ends badly.
Worms are in the soil itself, while fungus gnats usually show up as tiny dark flies around the pot. If you’re seeing flying pests, overly wet potting soil is often part of the problem, so check your watering routine before assuming every bug is the same thing.
Yes, that’s a smart move when you suspect pests. Separating the plant gives you time to watch what’s happening without inviting the rest of your houseplants into the mess.
You can keep leftovers briefly if you label the container clearly and store it where kids and pets can’t reach it, but this is the kind of mixture that makes more sense to use fresh. It’s quick to mix, and you won’t have mystery containers hanging around the house.
Look beyond the remedy itself. Check whether the soil stays too wet, whether the pot drains properly, and whether the fern is getting the light and humidity it needs. A pest issue can be only part of the problem.
Usually, yes. This remedy uses a small amount of plain salt and water, plus optional matches, so the out-of-pocket cost is only a few cents per batch. That makes it an easy first step before buying a specialty product.
📌 Love this Sick Fern Remedy? Pin it!
Got a fern that looks rougher than it should? Save this simple remedy so you can find it fast when your next houseplant starts acting up.
Did you try this project? Tell us what signs your fern was showing and whether the salt rinse or the match method helped.
🖨️ Print-Friendly How-To: Sick Fern Remedy
Sick Fern Remedy
Equipment
Materials
- ½ cup salt
- 6 pints lukewarm water
- 4 to 6 matches
Instructions
- Measure 1/2 cup salt and 6 pints lukewarm water into a large container.
- Stir until the salt is mixed with the water.
- Use the mixture on the sick fern’s soil as the main remedy.
- Stick 4 to 6 matches, sulfur end first, into the soil.
- Check the fern over the next several days for improvement.
- Estimated cost is based on the consumable portion of plain table salt only and will vary by brand and store.
- Use the match method only as written by placing the sulfur ends into the soil.
- Keep matches away from children, pets, and open flame.
- Do not increase the salt beyond the stated ratio.
