Pests & Diseases

Spot the three caterpillar species eating your brassicas and treat them safely without broad‑spectrum sprays

I remember the first time I found holes in my brassica leaves—little crescent bites and ragged edges on my kale and cabbage—and my heart sank. Brassicas are such reliable garden stars, and seeing them chewed by caterpillars is always frustrating. Over the years I’ve learned to spot the three...

Oct 19, 2026 • by Émilie Laurent
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Spot the three caterpillar species eating your brassicas and treat them safely without broad‑spectrum sprays

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Convert a one-by-two metre shady balcony into a productive edible shade garden with a step-by-step planting map
Garden Design

Convert a one-by-two metre shady balcony into a productive edible shade garden with a step-by-step planting map

When I first inherited a narrow, shady balcony that measured just 1 by 2 metres, I figured edible...

Oct 14 Read more...
How to stop rosemary tip dieback after winter and nurse vigorous new shoots in three simple weekend steps
Plant Care

How to stop rosemary tip dieback after winter and nurse vigorous new shoots in three simple weekend steps

Winter can be hard on rosemary. After a few cold snaps or a long stretch of damp weather I often...

Oct 12 Read more...
step-by-step: retrofit an ikea hackney bench into a winter cold frame for hardy seed starting
DIY Projects

step-by-step: retrofit an ikea hackney bench into a winter cold frame for hardy seed starting

I kept a small Ikea bench for years because it was sturdy, inexpensive and had a perfect footprint...

Sep 23 Read more...
how to build a pollinator-friendly berm with native plants that blooms from spring to frost
Eco Gardening

how to build a pollinator-friendly berm with native plants that blooms from spring to frost

I built my first pollinator-friendly berm after a summer of watching bees struggle across a sea of...

Sep 17 Read more...
how to stop whiteflies on greenhouse tomatoes using sticky cards, neem and a targeted release schedule
Pests & Diseases

how to stop whiteflies on greenhouse tomatoes using sticky cards, neem and a targeted release schedule

I grow most of my tomatoes in a small greenhouse—it gives me earlier harvests and more...

Sep 10 Read more...
which cheap self-watering planters actually keep balcony herbs alive for two weeks without topping up
Plant Care

which cheap self-watering planters actually keep balcony herbs alive for two weeks without topping up

Keeping herbs alive on a sunny (or sometimes scorching) balcony while you’re away for a long...

Sep 05 Read more...

Latest News from Groupegarden

When to cut back summer-flowering perennials to extend blooms and avoid winter die-back Plant Care

When to cut back summer-flowering perennials to extend blooms and avoid winter die-back

Keeping summer-flowering perennials blooming longer while also protecting them from winter die-back is one of those balancing acts I love figuring out in the garden. Cut too soon and you lose late-season flowers; wait too long and crowns can rot or fail to harden off before frosts. Below I share...

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Which cheap soil amendments actually fix compacted clay in place and how to apply them Plant Care

Which cheap soil amendments actually fix compacted clay in place and how to apply them

I work a lot with small urban yards and stubborn clay soils, so I’ve spent years testing cheap, low-tech fixes that actually help compacted clay loosen up and stay workable. Clay can feel impossible: it puddles, it’s heavy to dig, and roots struggle in it. But you don’t need fancy amendments...

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Exactly when and how to harden off seedlings on a windy apartment balcony without losing a tray Plant Care

Exactly when and how to harden off seedlings on a windy apartment balcony without losing a tray

Windy balconies can feel like a battleground when you're trying to harden off tender seedlings. I learned the hard way during my first urban gardening season: a gust sent an entire tray of brassicas sliding across concrete and left me replanting seedlings that never recovered. Since then I've...

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Weeknight plan: turn three supermarket herb pots into a layered balcony herb garden that saves water DIY Projects

Weeknight plan: turn three supermarket herb pots into a layered balcony herb garden that saves water

I love a quick, satisfying project that turns an ordinary weeknight into something green and useful. Recently I took three inexpensive supermarket herb pots—those basil, parsley and chive plants that look a little tired in their plastic cups—and turned them into a layered balcony herb garden...

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Which organic nematode products actually control vine weevils and how to apply them for potted rhododendrons Pests & Diseases

Which organic nematode products actually control vine weevils and how to apply them for potted rhododendrons

I lost more than a few beloved potted rhododendrons to vine weevil a few years ago before I finally turned to biological control. After reading studies, testing products in my own patio pots and talking to other gardeners, I now use nematodes as a regular part of my pest-control kit for containers....

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How to stop early blight on tomatoes using copper fungicide and practical cultural fixes Pests & Diseases

How to stop early blight on tomatoes using copper fungicide and practical cultural fixes

I remember the first season I lost half my tomato crop to early blight — those telltale brown target-shaped spots on lower leaves, the rapid defoliation, and the slow dread as the main stems weakened. Since then I’ve learned that stopping early blight takes patience and a mix of smart cultural...

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How to force spring bulbs in pots on a radiator or sunny windowsill for early blooms Plant Care

How to force spring bulbs in pots on a radiator or sunny windowsill for early blooms

I love the little magic of forcing bulbs indoors: a handful of cool, dormant bulbs turning into fragrant flowers while it’s still grey outside always feels like a small celebration. Over the years I’ve forced dozens of bulbs on sunny windowsills and even on warm radiators when space was tight....

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Which bee-friendly annuals bloom through summer heat and exactly when to sow them for nonstop pollinator visits Seasonal Planting

Which bee-friendly annuals bloom through summer heat and exactly when to sow them for nonstop pollinator visits

When summer arrives and temperatures climb, many gardeners worry that blooms — and the pollinators that rely on them — will fade. Over the years I’ve learned that a mix of hardy annuals, timed sowings and a little summer care will keep nectar flowing from early June to late September. Below I...

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How to stop root rot in containers: diagnose the cause and save plants in five targeted steps Pests & Diseases

How to stop root rot in containers: diagnose the cause and save plants in five targeted steps

I hate losing a favourite container plant to root rot. Over the years I’ve rescued tomatoes, geraniums and even a beloved potted hydrangea by spotting the problem early and acting decisively. Root rot in containers is one of those silent killers: the top growth can look only slightly droopy while...

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Which compact drip irrigation timers work best for balconies under 20 litres a week (tested recommendations) Plant Care

Which compact drip irrigation timers work best for balconies under 20 litres a week (tested recommendations)

I tested a handful of compact drip irrigation timers on my own balcony to find practical, reliable options for container gardens that need very little water — I’m talking under 20 litres a week for a small set of pots. Containers behave differently than beds: they dry fast, need short bursts...

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