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Cultiwool 4" x 4" x 2.5" Blocks of Cultilene Rockwool - Case of 216


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Price: $180.88 USD
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Price: $180.88 USD
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Availability: 24 in stock

Estimated Arrival: Between Apr 24 and Apr 29.

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Why Buy From Grow Tents Depot
  • Cultiwool 4" x 4" x 2.5" Block (216 Blocks/Case) - Cultilene: Cultiwool's growing blocks are known for their remarkable efficiency. Their superiority is linked to the consistent nature of our products. The swift and uncomplicated absorption of water and the even distribution of water throughout the substrate are prominent features of a competent growing medium.
  • High Quality Stone Wool: Alongside offering the finest quality stone wool available in the market, Cultiwool also pioneers the introduction of the 'donut ring' to the retail market enhancing water distribution. This additional feature is coupled with the highly valued cross-grooves which augment water flow beneath the block. Moreover, it includes a black/white foil to counteract algae growth.
  • Cultiwool Substrate Blocks: Our blocks are designed with drainage grooves at the bottom to optimize the flow of water beneath the block. This feature is particularly beneficial when the substrate blocks are positioned on cultivation tables and concrete floors. An added advantage of the drainage grooves beneath the block is that it minimizes the contact surface with the ground, thereby preventing the introduction of diseases into the plant via weak roots often associated with high temperatures.
  • First in the Industry: Cultiwool stands as the first in the industry to equip the substrate with a 'donut ring'. This is a water chamber around the plug hole for your drippers. With the donut ring, you will attain an even more uniform distribution of water throughout the block. An additional bonus is that the donut ring eliminates any chance of errors regarding the placement of the drippers in the block.
  • Cultiwool 4" x 4" x 2.5" Rockwool Blocks: These superior blocks are sold by the case, ensuring you have the necessary quantity for your needs.
  • Specifications
  • Product: Stonewool Block
  • Plug Hole Size: 38mm / 40mm
  • Special Feature: Drainage Width Grooves
  • Dimensions: 4" x 4" x 2.5" (100mm x 100mm x 65mm)
  • Quantity per Case: 216 Blocks
  • Bulk Discount
  • Buy 2 or more of this item and receive $5 off each at checkout!
  • Price Match Guarantee
  • Shop safe knowing that Grow Tents Depot offers the lowest prices on all of our products - all the time - guaranteed!
  • We work very hard to ensure that we always have the absolute best prices online, so we make this guarantee knowing that if you find a lower price somewhere else, we will match or even beat our competitor's price! Simply reach out to us with a screenshot and link of our competitor's price (including shipping) and let us make you an offer! If you have already purchased with us and you find a better price within one week of your order, let us know and we will issue a refund for the difference!
  • Our 100% price match guarantee has some limitations:
  • -Promotions such as rebates, "buy one, get one free", and other discounts are not eligible.
  • -The item must be in stock on the competitors website when you request your price match.
  • -The competitor must be an online store and may not have a retail location.
  • -The website cannot be a discounter or auction website (e.g. Amazon, eBay, Overstock, etc.).
  • -The competitor must be an authorized retailer of the product in question.
  • -The price match applies to the item price and the shipping charges but excludes sales tax.
  • -On rare occasions, we reserve the right to refuse a price match if we would incur a loss.
  • Get growing today!
  • Shipping, Returns, and Cancellations
  • Order Confirmation:
  • As soon as your order is placed, an order confirmation e-mail will be sent to you. This means that your order has been successfully entered into our system and that we have pre-authorized your payment method for the purchase. In rare cases, if your product is unavailable or delayed, we will contact you and see if you would like to either wait for your item(s) to become available, change your order, or simply be refunded for your cancelled item(s). If your item(s) are immediately available, we will process your order and arrange for soonest possible shipment. Please note that once the order is processed we are unable to change the shipping address.
  • Order Shipment:
  • We offer FREE SHIPPING on all orders and currently service the lower 48 states. Most items are shipped within 1 to 3 business days and shipping time is typically between 1 to 7 business days. There are some products that have a slightly longer lead time and this will be indicated on the individual product pages if applicable. Once your order has shipped, we will send you the tracking information as soon as it becomes available. If a week or more has gone by and you still have not received the tracking information (or the number is not working), please reach out to us right away at If you are in Alaska, Hawaii, or outside of the US and would like to place an order: we may be able to ship to you, but you will need to reach out to us for a custom shipping quote.
  • Cancellations and Refunds:
  • If you need to cancel your order, please reach out to us as soon as possible. Cancelled orders are subject to a 5% administrative fee (for credit card, debit card, Amazon Pay, Coinbase, and Facebook orders) or an 8% administrative fee (for Shop Pay Installments and Sezzle orders). We can accommodate most cancellation and refund requests, however if a product has been arranged to ship or has shipped, then the item will be treated as a return and will potentially be subject to return shipping costs and restocking fees. Any refunds that may be issued will only be issued to the original payment method used when placing your order and only after the return has been confirmed to be received back in its original condition.
  • Returns:
  • Please see our full return policy at the footer of this page for brand-specific details. A restocking fee of 5-25% may apply on returns within the dates of the brand-specific return policies. If you would like to proceed with a return, please reach out to us to receive the precise return instructions and clarification on the restocking fees for your item(s).
  • Warranty
  • Grow Tents Depot only sells brand new products, never used, and therefore all items come with full manufacturer warranties if offered. Please note that Grow Tents Depot is not responsible for replacing or repairing your product while under warranty as this is the manufacturer's commitment to you. However, Grow Tents Depot would be happy to assist you in getting your product repaired or replaced by coordinating with the manufacturer.
  • If you would like us to assist with a warranty claim, please reach out to support with the following information:
  • Your order number.
  • Your shipping address.
  • A brief description of the issue.
  • Any photos or videos demonstrating the issue.

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