Caring for Your Corrogarden Raised Bed

Your garden bed is built to last, even if left in its natural state. Because we use premium MCA/ACQ (arsenic-free) treated hoop pine, the timber is designed to resist decay and insects. While the wood will naturally weather and gracefully age in appearance over time, it will remain structurally sound and fully functional in the harsh Australian elements for 5+ years with zero treatment.

Natural Greying: All unsealed timber naturally greys over time when exposed to UV light. This weathering process is completely normal and does not affect the structural integrity of your garden bed.

However, if you want to lock in that fresh timber look or match the bed to your house trim, painting or sealing is a fantastic option. And the best part? Because our unique plastic tub design separates your potting mix from the timber frame, you can safely use standard exterior finishes.

TLDR: Sealing Options at a Glance

What about Organic or Natural finishes like raw Linseed, Tung, or Hemp oil?

While these are traditional choices, they struggle in the harsh Australian climate. Raw linseed oil takes weeks to dry, stays sticky, and is notorious for attracting black mold in humid weather. Hemp and beeswax simply wash or melt away outdoors. These methods of sealing also require very regualar maintanace and reapplication.

Ready to Seal? Here are the 3 Steps

Step 1: The Water Drop Test (Letting the Timber Dry)
While we dry the timber at our warehouse for as long as we can before delivery, treated pine can sometimes hold residual moisture. Never seal wet timber, as it will cause paint to blister or oils to go cloudy. To check if your bed is ready, splash a few drops of water onto the timber.

• If the water beads up on the surface, it's still too wet. Leave another week and try again.
• If the water instantly absorbs, the timber is dry, porous, and ready to seal!

Step 2: Choose Your Finish
Because your bed arrives fully or partially assembled, the flat timber panels are butted tightly against the legs. Here is what we recommend based on those tight joints:

• The Corrogarden Top Pick (Mineral/Oil-Based Decking Oil): We highly recommend using a penetrating mineral decking oil. Because it is thin, it naturally wicks deep into the tight joints where the timber boards meet, without pooling or clumping. Apply 2 coats for a beautiful, natural finish.
• For a Solid Colour (Exterior Acrylic Paint): Use an exterior timber primer followed by two coats of high-quality outdoor paint. Tip: Because paint is thick, brush carefully to avoid drips pooling in the tight timber joints.

How much do I need? A standard 1-Litre tin of oil or paint will easily provide the two coats needed for 1 to 2 beds.

Step 3: Preparation & Application
For easier handling and a cleaner finish, lift the corrugated tub out of the timber frame before you start painting or oiling.

Pro Tip: Protect the Feet!
While the timber is highly durable, placing the legs of your garden bed on a surface that reduces direct contact with wet ground—such as a paver, gravel, or our custom Protective Feet add-on—will significantly minimise moisture exposure and prolong its lifespan even further.

Micro Climates: The Pros and Cons of Harsh Environments

Even though our premium treated pine is highly durable, the speed at which it weathers and greys depends heavily on exactly where it lives in your yard. When setting up your new bed, it is important to remember a classic gardening paradox: the exact environmental conditions that make your veggies thrive can also be the harshest on your timber!

Many of these microclimates are brilliant strategies for boosting plant growth in certain climates and seasons, but they can quickly turn into harsh, wood-aging extremes in others. If you want to keep your timber looking newer for longer, be mindful of these common environmental setups and how they impact your garden bed:

• Hot Surfaces (Concrete, Pavers & Blue Metal Aggregate): Placing your bed directly on a concrete slab, asphalt, or landscaping rocks like blue metal creates a thermal mass. The Benefit: During winter or in cooler climates, this is a fantastic strategy. The surface absorbs the sun and radiates heat, keeping your potting mix warm and extending your growing season. The Catch: In the peak of summer, this same spot can turn into an absolute oven. The radiating heat essentially "bakes" the timber, causing it to dry out and weather rapidly.
• Reflective Surfaces: Setting the bed up right next to a light-coloured wall, a Colorbond fence, or near a pool. The Benefit: These surfaces act like giant mirrors, which is perfect for maximizing scarce sunlight during short winter days. The Catch: In the warmer months, they bounce concentrated UV light directly onto the sides of your garden bed, doubling its daily sun exposure and fading the timber.
• Greenhouses & Poly-Tunnels: The Benefit: Creates a wonderfully warm, humid space to protect winter seedlings from frost or grow tropicals year-round. The Catch: That same trapped humidity and lack of natural airflow mean the timber rarely gets a chance to dry out completely. This persistent dampness dramatically increases the potential for mould and mildew to establish and spread on the wood.
• Rainforest-Style Canopies (Heavy Tree Shade): The Benefit: An essential strategy for growing delicate leafy greens that would otherwise bolt or burn in the scorching midday summer sun. The Catch: During wetter, cooler seasons, the lack of direct sunlight, combined with dripping morning dew and falling leaf litter, means the wood stays continually damp. This creates the perfect environment for green algae or moss to grow on the timber.
• Stored or unplanted bed (No Shade): When a bed sits empty in the sun, the bare timber has no foliage protection. Once your veggies and herbs are thriving, the foliage naturally spills over the edges, casting shade over the timber and creating a cooler, protective microclimate that drastically slows down weathering.

The Takeaway: Utilizing these seasonal microclimates is a master-level gardening strategy! But because your bed will be exposed to these shifting extremes, caring for your timber becomes much more important. In high-heat oven conditions, applying a hydrating Mineral Decking Oil is crucial to stop cracking. In high-moisture setups, elevating the bed with our Protective Feet to ensure airflow underneath is essential to protect your investment.