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Fern Staghornfern

Staghorn Fern Dilution Calculator

Pick a product, enter how much water you are mixing, and get the gram range to weigh out — based on the effective-ingredient concentration or the recommended dilution ratio.

For reference only. Always follow the product label and your local regulations. Some chemicals listed here may be restricted or unavailable in your country, and legal limits differ by region. Items marked "Banned for Platycerium" must not be used on staghorn ferns.

Full pesticide & fertilizer reference for staghorn ferns

Every product the calculator supports, with its effective content, target use, and key cautions. Pesticides, fungicides and miticides for common Platycerium pests and diseases, plus water-soluble and micro-element fertilizers. Items marked Banned must never be used on staghorn ferns.

Pesticide

Insecticides

  • Abamectin 1.8%

    Kills mites and lepidopteran larvae; concentration is extremely low — never increase the dose.

  • Emamectin benzoate 5%

    Extremely high activity; especially effective against armyworms/noctuid moths.

  • Lambda-cyhalothrin 2.5%

    Broad-spectrum insecticide (kills most insects); contact action, fast knockdown.

  • Bifenthrin 2.5%

    Also controls some mites.

  • Deltamethrin 2.5%

    Broad-spectrum insecticide (kills most insects); contact action, fast knockdown, high activity — watch the concentration.

  • Imidacloprid 70%

    Broad-spectrum insecticide (kills most insects); systemic, controls aphids and planthoppers.

  • Thiamethoxam 25%

    Broad-spectrum insecticide (kills most insects); strong systemic uptake, good water solubility.

  • Clothianidin 20%

    Controls aphids, planthoppers, and thrips.

  • Dinotefuran 20%

    Third-generation neonicotinoid; strong systemic uptake; broad-spectrum insecticide (kills most insects).

  • Acetamiprid 20%

    Stomach poison, fast action; note bee toxicity; broad-spectrum insecticide (kills most insects).

  • Pymetrozine 25%

    Highly effective against aphids and planthoppers; unique mode of action.

  • Chlorpyrifos 40%

    Controls soil pests, leaf-eating insects, cockroaches, scale insects, and mirid bugs.

  • Phoxim 40%

    Controls cockroaches, scale insects, and mirid bugs; photodecomposes quickly — apply at dusk or as a soil drench.

  • Malathion 45%

    Low toxicity; short bee-safety interval; controls cockroaches, scale insects, and mirid bugs.

  • Chlorantraniliprole 20%

    Diamide class; highly effective against lepidopterans; long residual activity.

  • Cyantraniliprole 10%

    Diamide class; also controls thrips and leaf miners.

  • Cyromazine 50%

    Highly effective against leaf miners.

  • Spirotetramat 22.4%

    Bidirectional systemic uptake; controls scale insects and aphids.

  • Flonicamid 10%

    Highly effective against aphids; safe for bees.

  • Bacillus thuringiensis (Bt) 8000IU/mg

    Apply during early larval stage; avoid strong light.

  • Matrine 0.5%

    Botanical origin; short pre-harvest interval.

  • Pyrethrins 1.5%

    Breaks down quickly in light — apply at dusk.

Acaricides

  • Pyridaben 15%

    Fast knockdown; highly effective against adult mites (spider mites, broad mites).

  • Hexythiazox 5%

    Kills eggs and nymphs; long residual activity.

  • Etoxazole 10%

    Kills eggs and juvenile mites; ineffective against adults.

  • Bifenazate 43%

    Fast action against spider mites and broad mites; safe for natural enemies.

  • Spirodiclofen 20%

    Kills eggs and nymphs; long residual activity.

  • Diafenthiuron 20%

    Dual insecticidal and acaricidal activity; strong penetration.

  • Mineral oil 99%

    Physical suffocation; also suppresses sooty mold.

Fungicides

  • Hymexazol 30%

    Broad-spectrum fungicide (effective against fungi); soil sterilization, especially effective against damping-off and seedling rot; also promotes rooting.

  • Mancozeb 80%

    Broad-spectrum protectant fungicide (effective against fungi); apply before disease onset.

  • Chlorothalonil 75%

    Broad-spectrum protectant fungicide (effective against fungi); rain-resistant.

  • Thiram 50%

    Broad-spectrum protectant fungicide (effective against fungi); used for seed and soil treatment.

  • Carbendazim 50%

    Systemic; controls higher fungi; broad-spectrum protectant, effective against fungi.

  • Difenoconazole 10%

    Triazole class; strong penetration, curative application; effective against fungi including white mold, black mold, annular black spots, and water-soaked rot.

  • Tebuconazole 25%

    Triazole class; also controls powdery mildew and rust; curative application; effective against fungi including white mold, black mold, annular black spots, and water-soaked rot.

  • Propiconazole 25%

    Triazole class; treats leaf spot and rust; curative application; effective against fungi including white mold, black mold, annular black spots, and water-soaked rot.

  • Flusilazole 10%

    Triazole class; especially effective against scab; curative application; effective against fungi including white mold, black mold, annular black spots, and water-soaked rot.

  • Azoxystrobin 25%

    Broad-spectrum fungicide (effective against fungi); high resistance risk — rotate with other chemistries; effective including white mold, black mold, annular black spots, and water-soaked rot.

  • Pyraclostrobin 25%

    Broad-spectrum fungicide (effective against fungi); both protective and curative; strengthens plants; effective including white mold, black mold, annular black spots, and water-soaked rot.

  • Kresoxim-methyl 30%

    Methoxyacrylate class; especially effective against powdery mildew; curative application; effective against fungi including white mold, black mold, annular black spots, and water-soaked rot.

  • Thiophanate-methyl 70%

    Systemic; converts to carbendazim in planta; effective against fungi including white mold, black mold, annular black spots, and water-soaked rot.

  • Ethylicin 80%

    Broad-spectrum fungicide (effective against both fungi and bacteria); pungent odor; effective including white mold, black mold, annular black spots, and water-soaked rot.

  • Prochloraz 25%

    Anthracnose, center wilting with water-soaked expanding black spot margins.

  • Fludioxonil 2.5%

    Seed treatment; damping-off and root rot; black rot patches.

  • Isoprothiolane 40%

    Dedicated to rice blast.

  • Kasugamycin 2%

    Rice blast and bacterial diseases.

  • Zhongshengmycin 3%

    Bacterial diseases (soft rot, bacterial wilt).

  • Metalaxyl 35%

    Dedicated to oomycetes (downy mildew, blight); angular leaf lesions, black fungal growth.

  • Metalaxyl-M (Mefenoxam) 35%

    Dedicated to oomycetes; higher activity than metalaxyl; angular leaf lesions, black fungal growth.

  • Dimethomorph 50%

    Dedicated to oomycetes; especially effective against downy mildew; angular leaf lesions, black fungal growth.

  • Cymoxanil 72%

    Dedicated to oomycetes; often used in mixtures; angular leaf lesions, black fungal growth.

  • Mandipropamid 23.4%

    Dedicated to oomycetes; thin-layer penetration; angular leaf lesions, black fungal growth.

  • Cyazofamid 10%

    Dedicated to oomycetes; low use rate; angular leaf lesions, black fungal growth.

  • Thifluzamide 24%

    Dedicated to basidiomycetes (white rot, sheath blight).

  • Carboxin 20%

    Dedicated to basidiomycetes (damping-off, rust).

  • Procymidone 50%

    Controls gray mold and sclerotinia.

  • Iprodione 50%

    Controls early blight and gray mold.

  • Copper hydroxide 77% Banned

    Bacteria and oomycetes; watch for copper phytotoxicity.

  • Bacillus subtilis 100 billion CFU/g

    Prevents fungi and bacteria; best applied early.

  • Trichoderma harzianum 300 million CFU/g

    Controls root rot and white rot.

Fertilizer

Water-soluble NPK (balanced)

  • 20-20-20 balanced NPK Total NPK 60%

    Routine feeding every 4–6 weeks.

  • 19-19-19 balanced NPK Total NPK 57%

    Routine feeding every 4–6 weeks.

Water-soluble NPK (high-N)

  • 30-10-10 high-nitrogen NPK Total NPK 50%

    For fewer frond forks and premature yellowing; high-N fertilizer can cause etiolation — apply with care.

Water-soluble NPK (high-P)

  • 10-30-10 high-phosphorus NPK Total NPK 50%

    Can be used during spore maturation; but note it can cause premature plant senescence — use only during the spore maturation period.

  • Monopotassium phosphate (MKP) 52% P₂O₅ + 34% K₂O

    Can be used during spore maturation; but note it can cause premature plant senescence — use only during the spore maturation period.

Water-soluble NPK (high-K)

  • 10-10-30 high-potassium NPK Total NPK 50%

    (Preferred) Routine feeding every 4–6 weeks; applying in autumn improves stress resistance.

Single-element (potassium)

  • Potassium sulfate 50% K₂O

    For old-frond lodging and tip/margin scorch; spray only when potassium-deficient.

Secondary-element fertilizers

  • Calcium nitrate 15.5% CaO

    Prevents tender leaf wrinkling and new-leaf distortion; do not mix with phosphates.

  • Magnesium sulfate (Epsom salt) 16% MgO

    Prevents interveinal chlorosis; apply as foliar spray.

Micro-element fertilizers

  • Chelated iron (EDTA-Fe) EDTA-Fe 13%

    Spray for new-leaf vein whitening and scorched new-leaf veins.

  • Chelated zinc (EDTA-Zn) EDTA-Zn 15%

    Spray for small new leaves and clustered new leaves; use very sparingly.

  • Boron (Borax) 硼砂 11% B

    Use very sparingly.

Functional / organic

  • Humic acid fertilizer 腐殖酸≥40g/L

    For curled leaves not caused by spores; amino-acid-rich high-N; apply at low concentration and low frequency.

  • Amino acid fertilizer 氨基酸≥100g/L

    For curled leaves not caused by spores; high-N amino acid; apply at low concentration and low frequency.

  • Seaweed (alginic acid) fertilizer 海藻酸≥30g/L

    High-N amino acid type; always apply at very low concentration and low frequency; improves stress resistance.

  • EM (Effective Microorganisms) solution 有效活菌≥10亿/mL

    Environmental improvement; do not mix with fungicides.

Prohibited

  • Urea (high-concentration root drench) — Banned

    Banned for Platycerium.

  • Potassium chloride 60% K₂O Banned

    Banned for Platycerium.

  • Un-composted organic fertilizer — Banned

    Banned for Platycerium.

Related staghorn fern guides

Frequently asked questions

How does the calculator work?
For products with a known effective-ingredient percentage and a target solution concentration, it computes grams = water (mL) × target concentration ÷ content percentage. For biologicals and products without a concentration spec, it falls back to grams = water (mL) ÷ dilution ratio. It always shows a low–high range.
Why a range instead of one number?
Labels give a safe concentration window, not a single value. Start at the low end and increase only if needed.
Are these products safe for staghorn ferns?
Items marked "Banned for Platycerium" must never be used. For everything else, results are reference estimates — always read the product label and observe local pesticide regulations.
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