What's Wrong with My Gerbera?

Gerbera grows in a flat rosette with all its leaves radiating from a single growing point right at soil level. When water lands in that center and sits, the crown rots within days. Unlike overwatering in the roots, crown rot destroys the growing point itself, and there is no recovery once it goes fully soft.

Gerbera is a sun-loving South African plant that needs several hours of bright light to build the energy for its large blooms. In typical indoor light, even near a bright window, it rarely gets enough to flower reliably. Leaves stay green and the plant survives, but buds stall before they form.

Gerbera sold as a potted gift plant is typically at peak bloom when purchased and has a short indoor lifespan of a few months. Once the initial flush of flowers finishes, the plant often struggles to rebloom in typical home conditions. This is normal for the species when grown as a potted annual rather than a garden perennial.

Gerbera's broad, flat leaves are highly susceptible to powdery mildew, a fungal disease that leaves a white or gray dusty coating on the upper leaf surface. The fungus thrives when air is humid but not moving, which is common when gerberas are crowded together or placed in still indoor air. Warm days and cool nights accelerate it.

Gerbera has a dense, fibrous root system that rots quickly in soil that stays wet. Waterlogged roots stop delivering nutrients, and the plant pulls energy back from the oldest outer leaves first. Yellowing starts at the leaf tips and edges and works inward, and the soil will feel consistently wet.

The outermost leaves of a Gerbera rosette are the oldest and naturally yellow and die back as the plant puts energy into new growth at the center. If only one or two outer leaves are affected and fresh green leaves are visible at the center, this is normal turnover rather than a watering problem.

Spider mites are one of the most common Gerbera pests. They cause pale stippling or silvery streaking across the upper leaf surface, and fine webbing collects in the gaps between leaf stems at the crown. Warm, dry conditions encourage them, and gerbera's dense low rosette gives them plenty of sheltered spots to colonize.

Aphids cluster on new growth and flower buds, which gerbera produces from the center of the rosette. Soft-bodied and green or pale, they suck sap from the tender shoots and leave sticky honeydew on the leaves below. Flower stems and new buds are the first place to check.

Tiny white insects that lift off in a cloud when you brush the foliage. They feed on leaf undersides and leave behind pale mottled patches and sticky deposits on the upper surfaces. Gerbera grown in warm, still indoor air or sheltered patios is especially prone because whitefly populations thrive without wind to disperse them.