SuperThrive Mag-Pro 2-15-4 Blossom Booster - 8 fl oz

Phosphorus, Magnesium and Sulfur Support for Flowering - 8 fl oz

Plants need extra phosphorus and magnesium when they start to flower, and a base feed alone may not supply enough, especially with reverse osmosis, rain or de-ionized water. Mag-Pro 2-15-4 adds phosphorus, magnesium and sulfur in a concentrated liquid. It is formulated for use alongside a complete nutrient formula. Its analysis is 2-15-4 NPK with 2.0% magnesium and 1.5% sulfur.

The 8 fl oz bottle suits hobbyists, anyone trying a flowering supplement for the first time, and small indoor setups. Larger operations can use it to test a feed program before scaling up.

Key Features & Benefits

• 2-15-4 analysis — puts the emphasis on phosphorus (15.0% P2O5) for flowering stages.
• Magnesium and sulfur included — supplies 2.0% magnesium and 1.5% sulfur alongside the main nutrients.
• Several application methods — rates are listed for hand watering, siphon mixers, injectors and recirculating hydroponic systems.
• Compact bottle — measures 3 x 1.5 x 4.5 in and ships at 0.4 lb.

Who Should Use SuperThrive Mag-Pro

Growers who already run a complete nutrient formula and want a flowering-stage supplement will find it useful. It also suits growers on reverse osmosis, rain or de-ionized water, and anyone running hydroponic systems.

About SuperThrive Mag-Pro

SuperThrive Mag-Pro 2-15-4 is a plant supplement with total nitrogen of 2.0%, phosphorus (P2O5) of 15.0% and potassium (K2O) of 4.0%. The nitrogen comes as 1.1% ammoniacal and 0.9% nitrate. It also contains 2.0% manganese. The manufacturer directs that it always be used with a SuperThrive Complete Nutrient Formula.

Frequently Asked Questions

Q: Can I use Mag-Pro on its own?
A: No. The manufacturer says to always use it with a SuperThrive Complete Nutrient Formula. It supplements a base feed and does not replace one.

Q: How much do I use when hand watering?
A: For continuous feeding at every watering, mix 1/4 to 1/2 tsp per gallon of water. Check the label for intermittent rates.

Q: What is the rate for recirculating hydroponic systems?
A: Use 1-2 tsp per gallon of water. Confirm against the bottle label before use.

Q: What rates apply to siphon mixers and injectors?
A: For continuous feeding, a siphon mixer uses 2/3 to 1 fl oz per gallon of water to make a concentrate. An irrigation injector uses 4 to 8 fl oz per gallon of water to make an injectable concentrate.

Q: What does 2-15-4 mean?
A: It is the NPK analysis: 2% total nitrogen, 15% phosphate (P2O5) and 4% potash (K2O). The high middle number shows the phosphorus emphasis.

Q: Is it useful with purified water?
A: The manufacturer says growers using reverse osmosis, rain or de-ionized water can benefit from adding it throughout the growth cycle. Those water sources contain few minerals.