Troubleshooting
Strawberry Guava problems — and how to fix them
Strawberry Guava (Psidium cattleyanum) is generally forgiving once you match its basics, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Invasive spreading
One of the world's most aggressive invasive plants in Hawaii and other tropics; seeds spread by birds and it suckers densely. Deadhead, remove suckers and never plant near wildlands.
Fruit flies
A major host for tephritid fruit flies, which infest ripening berries; bag fruit, pick up drops and use traps to break the cycle.
Chlorosis in alkaline soil
Yellowing leaves with green veins signal iron deficiency on high-pH soils; correct with chelated iron and acidifying mulch.
Scale and sooty mould
Scale insects excrete honeydew that blackens leaves with sooty mould; treat with horticultural oil and encourage predators.
Prevent strawberry guava problems before they start
Most strawberry guava issues are care-mismatch, not bad luck. Dial in the basics:
Looking for strawberry guava in general rather than its problems? Read the full strawberry guava care guide — light, water, soil and feeding.
Strawberry Guava problems — FAQ
Why is my strawberry guava invasive spreading?
One of the world's most aggressive invasive plants in Hawaii and other tropics; seeds spread by birds and it suckers densely. Deadhead, remove suckers and never plant near wildlands.
Why is my strawberry guava fruit flies?
A major host for tephritid fruit flies, which infest ripening berries; bag fruit, pick up drops and use traps to break the cycle.
Why is my strawberry guava chlorosis in alkaline soil?
Yellowing leaves with green veins signal iron deficiency on high-pH soils; correct with chelated iron and acidifying mulch.
Why is my strawberry guava scale and sooty mould?
Scale insects excrete honeydew that blackens leaves with sooty mould; treat with horticultural oil and encourage predators.