Fertilizer Guide
Superthrive Foliage Pro
A complete liquid nutrient formula with the ideal 3-1-2 macro ratio for tropical houseplants.
Quick Answer
Superthrive Foliage Pro is a premium synthetic liquid fertilizer with a 9-3-6 NPK ratio, ideal for tropical houseplants. For safe, continuous feeding, dilute it to 1/4 teaspoon per gallon and use with every watering.
The Problem
Generic fertilizers cause salt buildup and leaf burn over time because they provide nutrients in ratios plants don't use. Foliage Pro solves this by mimicking the exact uptake profile of foliage plants.
When to Use This Tool
Use year-round for indoor tropicals, especially aroids (Monsteras, Philodendrons) experiencing slow growth or pale new leaves.
Who is this for?
- Houseplant collectors and aroid enthusiasts
- Indoor growers seeking a one-part nutrient solution
Application Reference
| Context | Guideline |
|---|---|
| pots | 1/4 teaspoon per gallon (maintenance) |
| garden | 1 teaspoon per gallon (production) |
What is Superthrive Foliage Pro?
Superthrive Foliage Pro (9-3-6) is a highly concentrated, complete synthetic liquid fertilizer. Originally branded under Dyna-Gro, it is widely considered the "holy grail" nutrient solution for indoor tropical plants and aroids.
The 3-1-2 Advantage
The secret to Foliage Pro's popularity is its 9-3-6 NPK formulation, which reduces to a 3-1-2 ratio. Botanical research indicates that this is the exact proportion of macronutrients that non-fruiting foliage plants naturally uptake from the soil. By feeding plants exactly what they use, Foliage Pro prevents toxic salt buildup in the root zone.
- High Nitrogen (9): Maximizes leaf size and stem thickness.
- Low Phosphorus (3): Provides just enough for energy transfer without accumulating toxic levels in container soils.
- Moderate Potassium (6): Ensures strong cellular walls and environmental stress resistance.
How to Apply (The Weakly, Weekly Method)
Because it is a liquid, Foliage Pro is immediately bio-available. The safest and most effective way to use it is through a method called weakly, weekly.
- Fill a watering can with 1 gallon of room-temperature water.
- Add exactly 1/4 teaspoon (1.25 ml) of Foliage Pro.
- Water your plants as normal, ensuring that at least 10% to 20% of the water runs out the drainage hole to flush away old salts.
Safety and Best Practices
As a highly concentrated synthetic nutrient, Foliage Pro can cause severe fertilizer burn if overdosed. Never "eyeball" the measurements—always use a measuring spoon or syringe. Shake the bottle vigorously before every use to ensure the heavy macro-minerals at the bottom are fully suspended.
Foliage Pro Dilution Guide
| Application Frequency | Dilution Rate | Best For |
|---|---|---|
| Every Watering (Maintenance) | 1/4 tsp per gallon | Indoor houseplants in stable conditions |
| Once a Month (Production) | 1 tsp per gallon | Fast-growing plants under bright grow lights |
Troubleshooting Guide
1 White crust on soil surface
Cause: Accumulation of unused salts due to under-watering (not watering until water runs out the bottom).
Flush the pot with pure water until it runs clear, and ensure 10-20% runoff during regular feedings.
Glossary of Terms
- Weakly, Weekly
- The practice of heavily diluting liquid fertilizer and applying it with every watering, rather than giving a massive dose once a month.
- Macronutrient Ratio
- The relative proportion of Nitrogen, Phosphorus, and Potassium. A 9-3-6 fertilizer has a 3-1-2 ratio.
Frequently Asked Questions
Is Foliage Pro safe to use with every watering?
Why is the 9-3-6 ratio so popular for houseplants?
Does it contain micronutrients?
Why am I seeing a white crust on my soil?
Should I use this on succulents or flowering plants?
Recommended next actions
Next Best Actions
Use fertilizer guidance with calculators, plant profiles, and related care articles.
Calculator
Aquarium Plant Fertilizer Dosage Calculator
Calculate exact macro and micro fertilizer doses for your planted aquarium based on tank volume, plant density, CO2 system, and dosing strategy.
Guide
Fertilizer Burn on Houseplants: How to Identify, Fix & Prevent Salt Damage
Fertilizer burn is one of the most misdiagnosed houseplant problems because its symptoms — brown tips, wilting, yellowing leaves — are nearly identical to overwatering, underwatering, and root rot. The treatment for root rot is opposite to the treatment for fertilizer burn, which means getting the diagnosis wrong makes the plant worse. This guide is built around that diagnostic problem first.
Calculator
Growth Timeline Calculator
Predict your plant's growth milestones and generate a personalized care calendar based on species, climate, and current conditions.
Guide
Why Are My Houseplant Leaves Turning Yellow? Complete Diagnosis & Fix
After diagnosing hundreds of yellow-leaf cases across dozens of plant species, we've mapped the ten distinct causes that look nearly identical at first glance — and built the only systematic guide that tells you not just what's wrong, but exactly how to confirm it and fix it.
Guide
Nitrogen Deficiency in Houseplants: Symptoms, Diagnosis & the 5-Day Fix
With over 12 years of houseplant nutrition diagnostics and more than 2,400 nutrient deficiency cases assessed across tropical and subtropical indoor environments, we have developed a rapid-response framework that distinguishes nitrogen starvation from overwatering in a single visual assessment — and reverses visible chlorosis within 5 to 7 days using a precise liquid feed protocol.
Plant Guide
Dieffenbachia (Dumb Cane)
After managing over 60 Dieffenbachia specimens in various indoor environments over the last 8 years, we have developed a strict protocol for safely handling and thriving with this highly toxic, yet undeniably stunning, tropical plant.