Bio Diesel - Rhino K – Premium Potassium, Vitamin & Fulvate Flower Hardener
Please note the above shipping is an estimation only. Actual shipping cost can be calculated on the checkout page.
Important shipping notice: This product is not stocked at our Thomastown, VIC warehouse and is dispatched from another local warehouse. Please allow approximately 1-2 weeks for it to reach us before it is ready for pickup or dispatch.
Bio Diesel - Rhino K - Premium Potassium, Vitamin & Fulvate Flower Hardener
Bio Diesel Rhino K is a high-performance, late-stage bloom additive designed to drive explosive bud burst, accelerate floral swelling, and maximise final crop density. Featuring a highly concentrated, pure 15% Potassium (K) solution, Rhino K is specifically engineered to meet the intense nutritional demands of plants during their last three weeks of budding. It provides the final mineral surge required to transform a good harvest into a heavy, competition-grade yield.
To ensure maximum efficiency, this advanced formula is infused with essential vitamins and premium fulvates. These organic compounds act as high-velocity transport agents, optimising nutrient availability and accelerating the translocation of key sugars directly into developing flowers. Rhino K systematically directs the plant's internal energy toward rapid bud swelling and heavy essential oil production, leaving zero harsh chemical residues or heavy metals behind for an incredibly clean finish.
Best For: Swelling and hardening flowers during the final 3 weeks of bloom, maximising sugar translocation, boosting natural oil and resin production, and ensuring a clean, residue-free harvest.
Key Features:
- Pure 15% Potassium (K) Surge: Delivers a clean, highly concentrated dose of bioavailable Potassium to support the high-energy demands of late-stage floral hardening and swelling.
- Fulvate Nutrient Accelerators: Infused with premium fulvates that act as natural chelators, maximising the movement of essential minerals and directing vital energy toward heavy bud formation.
- Sugar & Brix Translocation: Enhances the plant’s internal transport pathways, moving stored carbohydrates out of the foliage and packing them directly into the blooms for increased weight.
- Vitamin-Fortified Vitality: Fortified with a specialised vitamin profile to reduce environmental stress and keep plant metabolism running at peak efficiency during the demanding final weeks.
- Ultra-Clean, Residue-Free Formula: Scientifically formulated to be completely free of heavy metals and harsh synthetic chemicals, allowing plants to naturally ripen for a smooth final flush.
Specifications:
| Feature | Details |
|---|---|
| Brand | Bio Diesel |
| Product Type | Late-Stage Liquid Potassium (K) Booster & Hardener |
| Active Ingredients | 15% Soluble Potassium, Organic Fulvates, and Vitamins |
| Application Phase | Final 3 Weeks of Flowering (prior to flush) |
| Compatible Media | Coco Coir, Soil, Rockwool, and Hydroponics |
| Available Sizes | 1 Litre, 5 Litre, and 20 Litre |
Ideal For:
- Late-Stage Bud Swelling: Introduce during the final three weeks of active blooming to provide the intense potassium push needed to lock in floral density and weight.
- Essential Oil & Terpene Maximisation: Run alongside your base nutrients to drive the synthesis of secondary metabolites, coating flowers in sticky, aromatic resin.
- Clean Crop Finisher: Perfect for growers demanding a premium, heavy harvest free from heavy-metal build-up or harsh nutrient residues.
Usage Tip: For the ultimate finish, use Rhino K in conjunction with Bio Diesel Marine. The organic compounds in the Marine kelp work synergistically with the 15% Potassium in Rhino K to signal the plant to finish with maximum resin production and a superior aromatic profile.
| Size |
1L, 5L, 20L |
|---|
Oversized Item Delivery Options
Since oversized items require special handling, we may need to provide a custom freight quote for your order and will contact you with an updated shipping rate.
Available options include:
✔ Delivery to your closest depot for pickup - default method
✔ Direct delivery - requires forklift on site
✔ Direct delivery with tailgate lift truck (extra fees apply)
✔ Forklift loading at our warehouse (no extra charge if you arrange your own freight)
✔ Direct truck delivery (available in Victoria)
Important Notes:
- Shipping costs vary by location and method
- Because of the forklift requirement, delivery to the nearest depot is the default option and will be the method used unless you contact us to request otherwise.
Business Delivery:
- Business delivery is available for commercial customers only
- If you select business delivery and your products are bulky, it is your responsibility to ensure you have appropriate equipment (including forklifts) to unload products from the delivery truck
- If you select business delivery and you are not a business, you risk your product not being delivered and may incur additional fees to retrieve your order
- Business delivery customers must provide a valid business address and contact information
- Additional fees may apply for failed delivery attempts due to lack of appropriate unloading equipment
Let us know your preference, and we'll arrange the best solution for you!
Important Note on Availability & Shipping
Our warehouse serves as our office and logistics centre rather than a retail showroom. Because we ship from multiple locations and manage high-turnover stock, not all items are available for immediate pickup.
Lead Times:
- In-Stock Items: Usually ready for dispatch the same day.
- Supplier-Dependent Items: Usually take 2–8 weeks to arrive, depending on supplier availability. Products from Adloheat may take 8–12 weeks to manufacture—they are made to order in Australia by a small business, and longer lead times reflect the care put into quality.
While we strive for fast delivery, some timelines are subject to supplier availability and are beyond our control. We appreciate your patience as we source the best quality gear for your project.
Biosecurity & Interstate Shipping Restrictions
Due to strict state biosecurity regulations, we are unable to ship some products to certain states and territories:
- Potting Mixes cannot be shipped to Western Australia (WA), the Northern Territory (NT), or Tasmania (TAS).
- Seeds cannot be shipped to Western Australia (WA).
Orders placed for these items to restricted states will be cancelled and refunded. It is the customer's responsibility to ensure that the items being ordered can lawfully be delivered to their state or territory.
We Offer the Best Prices
We are committed to offering our customers the best prices possible. If you find the exact same product advertised at a lower price elsewhere, we invite you to contact us and we will review your price match request.
Price Match Conditions:
- The competitor must be an Australian-based seller with a physical presence in Australia
- The product must be the exact same item with a matching SKU or model number
- The product must be in stock and available for purchase at the competitor
- The lower price must be publicly advertised and currently available (not a clearance, closeout, or discontinued item)
- Price matching excludes marketplace platforms including but not limited to Temu and Aliexpress
- Price matching requests must be made before purchase
How to Request a Price Match:
To request a price match, please contact us at sales@greenhousepolytunnels.com.au with a link to the competitor's product listing, or call us on 0418 438 774. Please include the product details and the advertised lower price. We will review your request and respond within 2 business days.
Shop
- Choosing a selection results in a full page refresh.


