Royal Black: Humic Acid

Brand: Future Harvest

Product Code: 0300222

Availability:In stock

$19.49 19.49

Available Options


Royal Black is OMRI Listed for Organic Use.

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

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



Available sizes shown from 1L, 4L, 10L, 20L, 208L, totes of Royal Black


Key Features:

  • Enriched with a small amount of potassium silicate for extra plant benefits such as stronger cell walls and increased chlorophyll production.
  • There is no need for any extra silicon products when using Royal Black!
  • Suitable for soil and coco and works well 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!



Future Harvest Royal Black Guaranteed Analysis


Product Comparison:

  • General Hydroponics: Diamond Black
  • Green Planet: GPH
  • GroTek: LXR Black






Customer Reviews

Based on 2 reviews Write a review


The Future Harvest online store ships all over Canada and the United States from Canada. We also have a distributor in the United Kingdom, The Growers Wholesale. CLICK HERE for a list of our distributors. 

All orders are processed within 1 business day.

Your order will be marked as fulfilled from the moment it’s been boxed up in the warehouse awaiting for the courier to pick it up. Once your order has been fulfilled, you will receive an email with your tracking number. Your tracking details will appear once the courier has processed the package.

We deliver packages through the following couriers: Canada Post, UPS, Canpar, and Purolator. The courier will be chosen based on the fastest estimated shipping time. 

We currently only ship to PO Boxes across Canada via Canada Post. If you enter a PO box for a US order, we will contact you to provide an alternative delivery address.





In Canada, we offer free shipping over $100 CAD before tax. In the United States, we offer free shipping over $150 CAD. 



All Future Harvest online orders will be shipped out in branded boxes. If you would like discreet shipping, simply request for it in the shipping notes section on the cart page. 



Shipping Times
British Columbia 
2-3 business days 
& Manitoba 
3-5 business days 
Ontario, Quebec,
Newfoundland & Labrador,
& PEI 
3-7 business days 
USA 7-15 business days 



Nutrients can freeze when exposed to cold temperatures. We protect your packages by shipping liquid nutrients with heat packs and faster shipping methods during the winter months. Depending on courier, your package may not be sent out until the following Monday to ensure it does not sit in a cold warehouse over the weekend. If your nutrients freeze, simply mix the entire bottle with an equal amount of hot water (preferably reverse osmosis or distilled water) and double your dosage. For detailed information CLICK HERE

Occasionally, our online inventory is inaccurate. In the case we cannot fulfill your order due to an item being out of stock, we will contact you within 24 hours whether to cancel the order or wait for the item to be back in stock. 

We reserve the right to cancel & refund any order where we cannot economically ship to. If this happens you will be refunded in full and notified of the issue. 


Refund Policy


Our policy lasts 30 days. If 30 days have gone by since your purchase, unfortunately we can’t offer you a refund or exchange.

To be eligible for a return, your item must be unused and in the same condition that you received it. 

To complete your return, we require a receipt or proof of purchase.

Once your return is received and inspected, we will send you an email to notify you that we have received your returned item. We will also notify you of the approval or rejection of your refund.

If you are approved, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment, within a certain amount of days.

Late Refunds
If you haven’t received a refund yet, first check your bank account again.
Then contact your credit card company, it may take some time before your refund is officially posted.
Next contact your bank. There is often some processing time before a refund is posted.
If you’ve done all of this and you still have not received your refund yet, please contact us at

We only replace items if they are defective or damaged. If you need to exchange it for the same item, send us an email at and send your item to: 725 Evans Court, Kelowna, British Columbia, CA, V1X 6G4.

To return your product, you should mail your product to: 725 Evans Court Kelowna British Columbia CA V1X 6G4

You will be responsible for paying for your own shipping costs for returning your item. Shipping costs are non-refundable. If you receive a refund, the original cost of shipping will be deducted from your refund, unless you the customer paid the original shipping.

Depending on where you live, the time it may take for your exchanged product to reach you, may vary.

If you are shipping an item over $75, you should consider using a trackable shipping service or purchasing shipping insurance. We don’t guarantee that we will receive your returned item.



Ask a Question
  • Royal black shouldn’t be used in DWC system.

    Hi Robert,


    That is correct, because the humic acid in Royal Black will take too long to break down. You'd want to use Royal Gold instead for a DWC as the fulvic acid will act faster.


    Thanks for the comment and have a great day!

  • Hi, can i use this type of product for lawn

    Royal Black is safe for use in your garden or on your lawn

  • 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.