Royal Black

Brand: Future Harvest

Product Code: 0300222

Availability:In stock

$17.99 17.99

Available Options


Royal Black is OMRI Listed for Organic Use.

Royal Black chelates nutrients like magnesium, calcium and iron and provides natural carrier compounds that transport nutrients and vitamins into your plants more efficiently enhancing their growth.

It also stimulates roots and enzymatic function, increases vitality in seedlings and clones and assists in the more efficient utilization of nutrients and vitamins.

Key Features:

  • Enriched with a small amount of potassium silicate for extra plant benefits such as stronger cell walls and increased chlorophyll production, so no need for any extra silicon products when using Royal Black
  • Works well in mediums such as soil and coco and with any branded fertilizer or additive
  • Pre-treat pots with Royal Black, especially when using coco (this does not contain any humate matter like soil) to get plants off to a good start

Product Comparison:

  1. General Hydroponics: Floralicious Grow
  2. Advanced: Grandma Enggy's 







Ask a Question
  • Is royal Black effective with a peat based substrate, ie promix?

    Royal Black can definitely be beneficial when used on a peat based medium. 

  • Can/should, Royal black, or royal gold be used in cloning process. If so, how many ml/L

    It is probably best to hold off on RB and RG early in the development.  Young plants can be sensitive to too many fertilizers and additives.

  • What is your method of pretreating pots with this product and what are the expected outcomes?

    Hello, thanks for the question. 
    If you were planning on pretreating the pot with Royal Black,
    We would recommend mixing a 1/3 of the week 1 dosage of Royal Black in a 1L watering container.
    Then pour that into a mister bottle and give the pot a foilier spray prior to adding the soil,

    A process like this would be a step beyond an amatuer grower, the expected 
    outcomes of a process like this would be promoting a healthy root environment
    and enriching the soil with beneficial life from the momment it touches the pot.

    If you have any other questions please feel free to message us!

  • Can I use this as a foliar spray????

    Unfortunately not. Royal Black requires time to break down before it becomes bioavailable to the plant. This product is only recommended for soil applications.

  • What is the best way to mix almost solidify instantly when I pour into measurements

    There are a few good practices we recommend when mixing a nutrient solution: - always mix micro first - never mix products directly together, always mix one by one in water - allow additional mixing time between products if you have any other questions, please email me at

  • Hi I was just wondering if royal black can be used in a hydroponic system.Thanks

    Hi there, we only recommend using Royal Black in a soil medium. Humic Acid needs time to breakdown in order to become bioavailable to the plant. In a hydroponic setup, depending on the dosage, it could precipitate in your reservoir and clog your lines. You could apply a few drops per litre to avoid any precipitation but the benefit would be very minimal in this case.