Foxfarm Cha Ching — High-Phosphorus Late Flowering Booster for Hydroponic Systems
Best for: Hydroponic growers in the final flowering weeks who want bigger, denser results without breaking the bank
Our thoughts
Cha Ching is a no-nonsense phosphorus spike that does one job very well — supporting late-stage flower development when it counts. It's strong stuff though, so respect the dosing. Follow the directions properly and you'll see results; wing it and you'll burn plants. One growers reach for when they've got the fundamentals sorted.
Foxfarm Cha Ching is a water-soluble, high-phosphorus fertiliser formulated specifically for the final weeks of flowering through harvest. With an NPK ratio of 9-50-10, it delivers a concentrated phosphorus and potassium boost designed to support flower density, size, and essential oil production without leaving the salty residue that catches you out in hydroponic systems. This is a precision finisher, not a general feed — it works best when you're already running a proper base nutrient schedule.
How it compares
Cha Ching sits in the high-potency, professional-grade booster category.
- Significantly cheaper per application than premium brands like Advanced Nutrients
- Much more concentrated than basic bloom feeds — you use it in teaspoon doses, not cups
- Optimised for hydroponic and soilless growing; can be too hot for living soil systems
- Part of the FoxFarm trilogy (Open Sesame, Beastie Bloomz, Cha Ching) — works best when integrated into the full sequence
Usage guidance
Hydroponic and drip irrigation
Mix 1 teaspoon (6g) per gallon of water in your reservoir. Feed every other watering during final weeks of flowering. This is strong stuff — don't guess the dose or you'll burn plants.
Container and soilless systems
Use 1/2 to 1 teaspoon per gallon of water. Start at the lower end if plants aren't at full health. Cha Ching is very concentrated and can stress weak plants.
Timing in the cycle
Begin feeding once flowers are fully formed. Stop using it during your final flush week before harvest. Do not use as a foliar spray. Never mix dry solubles together before dissolving.
Integration with FoxFarm base nutrients
Use Open Sesame early, switch to Beastie Bloomz once buds set, then introduce Cha Ching for the final push. Skipping steps or running it without proper base nutrition limits what it can actually deliver.
Technical specifications
- Format: Water-soluble powder
- NPK Ratio: 9-50-10 (high phosphorus, moderate potassium)
- Micronutrients: Calcium, magnesium, boron, manganese, sulphur, molybdenum, iron, copper, zinc
- Recommended dosage (hydroponic): 1 teaspoon (6g) per gallon (4L)
- Recommended dosage (soil/soilless): 1/2 to 1 teaspoon (3–6g) per gallon (4L)
- Application: Final weeks of flowering through harvest
- Frequency: Every other watering
- Salt buildup: Minimal — hydroponic system safe
Who this is for
- Established hydroponic growers who've mastered base nutrition and want a targeted late-stage boost
- Growers running the full FoxFarm nutrient schedule looking for proven compatibility
- Budget-conscious operators who want results without premium-brand pricing
- Anyone growing fruiting or flowering plants in controlled hydroponic environments
Not ideal for beginners flying solo without a base nutrient program, or for living soil growers — the salt concentration and high PK ratio can damage soil biology.
Our take
Cha Ching is potent, precise, and delivers measurable results when used properly. It's not magic, but it is effective — a proper phosphorus spike at a fraction of premium pricing. The catch is that it demands respect for dosing and timing. Treat it as a finisher, not a foundation.
If you've got your base feed dialled in and you're serious about final-stage flower development, worth picking up while stock lasts. Just read the label, follow it exactly, and you'll get what you're paying for.
