Skip to product information
1 of 3

Mammoth Silica

Regular price
Regular price
Sale price
Tax included.

Included in the A-Grade Rewards program



The geniuses behind Mammoth P Microbes have done it again!

Mammoth Silica (SI) is a revolutionary plant growth formula that optimises the health of your plant, thereby increasing yield. This unique formulation contains high levels of silicic acid, which is essential for plant growth and development. This formula is designed to increase the bioavailability of silicic acid, enabling plants to absorb more silica and improve their overall health.

With Mammoth Silica (SI), you can expect to see improved cellular development and increased production of cell walls, resulting in a sturdy framework for your plants. Mammoth Silica helps to strengthen plant stems, allowing them to support heavy flowers and withstand harsh environmental conditions.

Mammoth Silica (SI) is highly concentrated, with a low use rate of just 0.13 mL/L. This makes it easy to apply and extremely cost-effective, saving you time and money in the long run. Whether you're a seasoned grower or just starting out, Mammoth Silica (SI) is the perfect solution for achieving A-Grade, high-yielding plants.

So, if you're looking to improve plant health, structure and yield of your plants, Mammoth Silica (SI) is the perfect choice to add alongside your current hydroponic nutrient feeding program. Try it out today and experience the difference it can make in your grow!

MSDS Safety Data Sheet


*All orders are dispatched in unmarked boxes to maintain your privacy.*


Orders are shipped via Australia Post or Big Post. Orders are generally dispatched on Tuesday, Wednesday and Friday. Please allow for additional delivery time for remote areas. If you require express delivery, please contact our sales representatives at 03 9555 6667 or email to obtain a quote. 

Couriers will attempt delivery to the specified address. If no one is home to receive the delivery, the couriers will leave your parcel somewhere safe. If there is no safe place, re-delivery or collection will be organised.

We reserve the right to charge for any redeliveries if they occur. You are welcome to call us if special arrangements need to be made.  

Due to the increasing frequency of online fraud and theft, we are unable to ship to P.O. Boxes and Parcel Lockers.


All freight charges are calculated on weight, dimensions and location. We are committed to keeping shipping charges at a minimum and do not charge handling fees.

Please note: Freight costs are subject to change. Regional areas, large and bulky orders, and tail-lift delivery occasionally incur an additional levy. Should these costs need to be amended it will be to reflect the actual charges, and not incur additional ‘shipping and handling’ fees.

We will notify you if this rare situation occurs.



All payments must be cleared before dispatch. Payments can be made online via PayPal, AfterPay or Electronic Funds Transfer. Payments can also be accepted via credit card by phoning 03 9555 6667.

Please allow at least 24 hours for payments to clear.


You will be notified immediately if an item is permanently unavailable, with options for a replacement item at equal or higher value, refund or store credit.

All refunds will clear within 3-5 business days. Store Credits will be issued as an electronic Gift Card to be used online or in-store.


We comply with all necessary restrictions and guidelines when shipping any products classified under the Dangerous & Prohibited Goods & Packaging Post Guide.

If, for any reason in compliance with these guidelines, we are unable to fulfil an order a refund will be issued immediately.