A gardening expert has warned Brits that leaving potted plants on the ground during storms could suffocate the roots and lead to severe damage or even kill the plants
Potted plants could become waterlogged if they are unable to drain properly during heavy rainfall(Image: GETTY)
The UK is experiencing a return to wet weather, but while many gardeners might think this is good for their plants, one expert has sounded the alarm. This is especially true for those with potted plants or containers, as leaving these on the ground during storms could suffocate the roots and cause severe damage or even kill the plants.
Josh Novell, a gardening expert at Polhill Garden Centre, has cautioned that rain isn’t as benign for some plants as people assume. He has urged anyone with potted plants or containers to move them off any soil before storms hit, as this can stop water from draining out of the container.
He explained: “Even a short downpour can suffocate roots if pots sit on saturated soil. Waterlogged soil blocks oxygen, nutrients can’t reach roots, and plants become prone to fungal diseases like root rot, powdery mildew, and leaf spot.
“Elevation is one of the easiest ways to protect your plants without complicated landscaping. It only takes a few minutes, but can make all the difference during heavy rainfall.”
Gardeners are being urged to protect their plants from heavy rainfalls, but not in the ways they might expect(Image: GETTY)
It’s best to position these containers well away from areas where rainwater naturally gathers, such as spots in your garden prone to puddles, and elevate them using bricks, plant stands or gravel to lift them at least two to three inches above ground level to shield plants from excessive waterlogging. Where possible, relocate any delicate plants to sheltered areas.
He also advised that gardeners should inspect their pots and containers ahead of downpours to make certain the drainage holes aren’t blocked, allowing surplus water to drain away. For additional defence, gardeners can apply a mulch layer to prevent soil from becoming overly compacted under the force of heavy rain.
Nevertheless, there are instances where this doesn’t apply as certain plants flourish when their soil becomes waterlogged. Josh said: “Some plants actually thrive in wet conditions. Aquatic plants, bog plants, and certain perennials like marsh marigolds or hostas enjoy soggy soil, so you don’t need to elevate or aerate them.”
For any towering plants you might have outside, the specialist recommended employing stakes or supports to anchor their height. This can help stop the top-heavy foliage from being knocked over by gales.
Putting the plants away from pooling areas or ideally under cover could help protect them(Image: GETTY)
Certain gardeners may naturally shield their more fragile plants but the covering they choose could determine whether they’re offering protection or inflicting harm. The expert added: “Many gardeners instinctively cover plants to protect them from heavy rain, but this can backfire.
“Trapped water and high humidity create the perfect environment for fungal diseases like powdery mildew and leaf spot. It’s far better to use breathable covers, or leave plants uncovered if they’re hardy enough.”
After the storm subsides, you can determine whether it’s caused any of these problems by examining the roots at the bottom of your plants. Josh said: “Roots can be waterlogged or beginning to rot before you notice any wilting above ground. Catching problems early gives you a chance to save plants before damage becomes irreversible.”
Should you spot water gathering at the bottom of your pots or trays once the rain ceases, attempt emptying the trays or elevating containers to assist drainage. This can help prevent suffocating the roots and attracting pests.
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