Barberton daisy spots on leaves: causes and what to do
8 results in the diagnosis tree begin with spots on the leaves, 5 of them marked likely when the answers fit. They are ordered here for Barberton daisy (Gerbera jamesonii), using what its sources say about light, soil moisture, humidity and pests and diseases and 2 problems recorded for it.
Sources last read 14 September 2026.
Gerbera jamesonii is a species of flowering plant in the genus Gerbera belonging to the basal Mutisieae tribe within the large Asteraceae family. It is indigenous to South Eastern Africa and commonly known as the Barberton daisy, the Transvaal daisy, and as Barbertonse madeliefie or Rooigousblom in Afrikaans. Wikipedia, CC BY-SA 4.0
Native range: Northern Prov. to Eswatini (subtropical). Also sold as African Daisy, Gerber Daisy, Gerbera Daisy, Transvaal Daisy and Veldt Daisy.
What Barberton daisy’s sources say that bears on this
- Light
- Full sunRHS · read 13 September 2026
- Soil moisture
- Well-drainedRHS · read 13 September 2026
- Humidity
- ASHRAE recommends indoor relative humidity between 30% and 60%Penn State Extension · read 13 September 2026
- Pests and diseases
- Can be troubled by tarsonemid mites, aphids, chrysanthemum leaf miner and greenhouse whitefly. Diseases: root rot, leaf spot and grey moulds.RHS · read 13 September 2026
How this shows up on a Barberton daisy
Dark spots with a yellow halo spreading across the leaves
Brown to black spots appear on the leaves of the Barberton daisy, often ringed with yellow, and enlarge until patches of the leaf die.
RHS lists leaf spot among the diseases it may get. The pathogen enters through the leaf surface while it is wet and kills the tissue around it.
Telling it apart: Whether they spread. Leaf spots enlarge and appear on new leaves; old damage stays the same.
RHS · read 13 September 2026Gray, furry patches on damaged or dying leaves
Soft, discolored patches on the leaves, stems or faded flowers of the Barberton daisy grow a gray fur that puffs dust when disturbed.
RHS lists gray mold among the diseases it may get. Crowding and damp air around the plant let spores settle and grow.
Telling it apart: Where it starts. Botrytis begins on damaged or dying tissue; mildew starts on healthy leaves.
RHS · read 13 September 2026Possible causes, likeliest first for a Barberton daisy
Most likely a leaf-spot infection
Ranked higher because Barberton daisy's recorded problems point this way.
- Dark spots with a yellow halo spreading across the leaves RHS
Why: Spots with a yellow ring around them are the mark of a fungus or bacterium spreading through the leaf, the ring being tissue that is dying ahead of it.
What to try:
- Remove the affected leaves and put them in the bin rather than the potting mix.
- Water the soil rather than the leaves, and stop misting.
What would settle it: Whether the spots grow. Mark the edge of one with a pencil dot and look again in a week; an infection advances, damage from a single event does not.
Most likely spider mites
Why: Spider mites feed on individual leaf cells, and each emptied cell shows as a pale speck.
What to try:
- Move the barberton daisy away from other plants.
- Wash the leaves, top and underside, with a strong spray of water in a shower or sink.
What would settle it: Hold a sheet of white paper under a leaf and tap the leaf. Tiny specks that move across the paper are mites.
Most likely powdery mildew
Why: A white coating that wipes off is the surface growth of a fungus.
What to try:
- Remove the worst-affected leaves.
- Improve air movement around the barberton daisy and space it away from others.
What would settle it: Wipe a patch. Powdery mildew comes away and leaves a yellowed patch beneath. White that does not wipe off is part of the leaf, or a mineral deposit from hard water.
Less likely for a Barberton daisy, still possible
Questions
- What usually causes spots on the leaves on a Barberton daisy?
- For Barberton daisy: a leaf-spot infection, spider mites and powdery mildew.
- How can I tell which one it is on my Barberton daisy?
- What do the marks look like? Pale, dry, bleached patches on the side facing the window; Brown or black spots, many with a yellow ring around them; Tiny pale speckles all over, sometimes with fine webbing underneath; A white powdery coating that wipes off; Silvery streaks with tiny black dots; Dark, soft, water-soaked patches.
- What do Barberton daisy's sources say about its light?
- RHS: Full sun.
- What does this look like on a Barberton daisy?
- Brown to black spots appear on the leaves of the Barberton daisy, often ringed with yellow, and enlarge until patches of the leaf die. Telling it apart: Whether they spread. Leaf spots enlarge and appear on new leaves; old damage stays the same.
Other plants that show spots on the leaves
SunflowerBrown, papery patches on the leaves nearest the glass
African violetFuzzy gray growth over spreading patches on leaves and stems
Bearded irisFuzzy gray growth over spreading patches on leaves and stems
Bigleaf hydrangeaBrown or black spots on the leaves that grow and merge
Blue passion flowerBleached patches on the side facing the glass
Busy LizzieAngular pale patches and a downy coating on the undersides
Something else wrong with the Barberton daisy?
What this does not cover
This page orders a decision tree's results using a plant's sourced care. It has not seen your plant, its pot or its window, and two problems at once are common: that is the usual reason a confident answer turns out wrong. The questions in the diagnosis tool narrow it further than a list can.