(3 customer reviews)


Stimulates flower production during all stages of bloom. 4-18-38 is rich in Potassium, includes Micronutrients and makes a great All Purpose Hydroponic Bloom Formula.

Not Avail in California


Product Form:

Dry Powder, Water Soluble

NPK Analysis:


Product Designation:

Standard (This means products may contain natural compounds as well as synthetic compounds popular in conventional agriculture)

Other Product Highlights:

Large amount of potassium to support flowering and fruit

Well Suited For:

Hydroponics, soil and soil-less

Primary Function/Use:

Multi-use fertilizer containing micro and macro-nutrients designed to produce large fruits, flowers and vegetables.

How to Mix:

Mix one (1) tsp. with one (1) gallon of water.

For larger batches, mix 1/2 lb. with 50 gallons of water.

When and Where to Use:

When flowering or fruiting sites appear.


Ensure bag is properly sealed and stored in cool, dry, dark place.

Additional information

Weight N/A

3 reviews for 4-18-38

  1. E.G.

    This is an excellent product. I have used it for several years and continue to have great success!

  2. Janie (verified owner)

    This stuff is amazing. I grow Adeniums that require low Nitrogen and high Potassium and have not found anything even remotely close to this. My plants are monsters and everyone asks me what I feed them. Its safe to use on my seedlings at half strength at 3 months of age. I highly recommend it.

  3. Jersey farmer (verified owner)

    This a great bloom food all by itself, add a bud boost and you will get excellent mass. A well balance food throughout flower that provides everything you need just add cal mag.

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