GRODAN - Block 4G

🧱 Grodan Rockwool Block DU 4G – 75x75x65mm with 42mm Hole

Grow from seed or clone all the way to harvest with the high-performing Grodan DU 4G Rockwool Block, designed for serious hydroponic growers. Individually wrapped and built tough, this medium-sized block offers excellent structure, moisture retention, and transplant tolerance.

✅ Key Features:

• 🌿 Versatile Use – Ideal for DWC systems and other hydroponic setups

• 🌱 From Start to Finish – Use with seeds or clones all the way to full harvest

• 🧵 High-Quality Construction – Grodan uses only premium-grade rockwool for maximum durability

• 🔄 Transplant-Friendly – Easily move to other media without stressing plants

• 📦 Individually Wrapped – Clean and easy to handle in any grow room

📏 Dimensions:

• Block: 75mm x 75mm x 65mm

• Pre-formed Hole: 42mm (diameter) x 40mm (depth)

📌 Pro Tip: Pre-soak your block in a weak nutrient solution and pH balance to 5.5–6.0 before use!

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

DISPATCH AND DELIVERY

Orders are shipped via Australia Post or shipping platform 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 grow@agradehydroponics.com 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 offered by the carrier.

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

SHIPPING COSTS

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 shipping 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.

A-Grade Hydroponics reserves the right to cancel the order if shipping costs become prohibitive and customers will be issued a full refund.

PAYMENT

All payments must be cleared before dispatch. Payments can be made online via PayPal, AfterPay, PayID 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.

FULFILMENT OF ORDERS

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.

DANGEROUS AND PROHIBITED GOODS

These goods are available for in-store collection only.