A gardening expert is warning against a potential surge in aphid populations that could devastate gardens nationwide. As the temperature heats up, these tiny insects could pose a huge threat to a variety of plants, with sweet peas being particularly vulnerable, says Elise Harclock, brand manager at Prestige Flowers.

Aphids, also known as greenflies or blackflies, are notorious for their rapid reproduction and can weaken plants quickly as they extract vital nutrients. This will often result in stunted growth, curled leaves, and can even kill plants. They also produce a sticky substance known as honeydew, which can further compromise plant health.

“Aphids can be a nightmare for gardens this time of year,” says Elise. “Especially for plants like sweet peas. Gardeners should regularly inspect your plants and quickly address any signs of aphids to prevent widespread damage. You can squish aphid colonies by hand to control their numbers before they escalate."

Here’s how:

Regular monitoring

“Frequently inspect your plants, focusing on shoot tips, flower buds, and the undersides of young leaves where aphids tend to congregate,” says Elise.

“Early detection is key to effective control.”

Manual removal

“If you spot aphid colonies, you’ll need to remove them by gently wiping or squishing the insects between your fingers.”

Encourage natural predators

Attract insects such as ladybirds, lacewings, and hoverflies to your garden. 

“These natural predators feed on aphids and can help maintain a balanced ecosystem in your garden,” says Elise.

“Planting companion plants like marigolds can draw these helpful insects to your garden.”

Proper garden maintenance

“Remove plant debris and weeds that may harbour aphids or their eggs,” advises Elise.

“Also mulching and composting appropriately can promote healthy soil, leading to more resilient plants.”

By remaining vigilant and implementing these proactive measures, gardeners can keep their sweet peas and other cherished plants safe from a possible aphid onslaught.

“It’s all about keeping a firm eye on things,” says Elise. “Know what to look out for and take rapid measures if you do see any warning signs and you’ll be fine. Happy gardening!”