Leaf & Flower Mould & Rot Control

What's the Difference Between Powdery Mildew and Bud Rot?

Powdery Mildew : Powdery mildew appears as a white, powder-like coating on the surface of leaves and stems. It's a fungal infection that spreads visibly across a plant, particularly in conditions with poor air circulation and high humidity.

Bud Rot (Botrytis)  : Bud rot develops inside dense flower clusters, where airflow is weakest. Unlike mildew, it's often invisible from the outside and only becomes apparent once a bud is opened by which point it has usually spread further than it appears.

How Do You Prevent Mould and Rot?

Improving airflow and air circulation is the single most effective way to prevent both mildew and rot, since stagnant, humid air is what allows fungal spores to establish. Controlling humidity is especially important during flowering, when dense flower clusters are most vulnerable to rot. Treating at the first visible sign of mildew also helps stop it spreading to unaffected growth.

Air Control, Fans & Filters range

FAQs

What causes powdery mildew in a grow room?

Powdery mildew is caused by fungal spores that thrive in poor airflow and high humidity around leaves.

How do I know if I have bud rot? Bud rot is often hidden inside the flower check for discolouration or a soft, mushy texture when opened.

Can powdery mildew spread to my whole plant?

Yes, mildew spreads quickly across leaf surfaces if untreated, especially in warm, humid, poorly ventilated conditions.

Is bud rot always visible from the outside?

Not always it often develops inside dense flower clusters before any external sign appears.

What's the best way to prevent mould returning?

Improve airflow and control humidity, particularly during flowering, when plants are most vulnerable to fungal issues.