Pests & plant health
Inspect a struggling plant before treating it
Identify the plant and photograph the whole plant, affected parts and nearby healthy plants.
When to do it
At the first sign of unexpected damage, or during regular checks.
What you need
- Phone or notebook
- Hand lens if available
- Plant name and care history
How to do it
- Identify the plant and photograph the whole plant, affected parts and nearby healthy plants. Record when symptoms began.
- Check moisture beside the roots, drainage, light and recent heat, frost or feeding changes. These can mimic pest damage.
- Look underneath leaves, along stems and at new growth for insects, eggs, webbing, droppings or lesions. Do not assume every insect is the cause.
- Compare old and new leaves and the pattern across the bed. Correct an obvious watering fault, but avoid several simultaneous treatments that obscure the cause.
- If damage spreads, roots collapse or the cause remains unclear, seek a local nursery, extension service or state plant-health authority. Send clear photos first; do not transport suspect material without instructions.
What success looks like
- You can describe the pattern and likely cause before choosing a response.
Watch out for
- Buying a spray from one yellow leaf.
- Confusing a predator with a pest.
Related help
Decide whether to feed and apply fertiliser
Check moisture, drainage, roots, light and recent feeding before blaming pale or slow growth on nutrients.
Manage small infestations without routine spraying
Identify the insect and its life stage.
Keep labels and a useful garden record
Label the plant and variety, planting date and bed or pot.
Sources and review
Checked 24 September 2026. Source-checked editorial guidance; not field-tested or independently reviewed by a horticulturist.