Mold on your indoor seedlings isn’t a lost causehere’s how to fix the problem.

While moldy seedlings may look alarming, they dont automatically need to be thrown in the trash.

Why Do Seedlings Get Moldy?

Small plants sprouting

Credit:Kindra Clineff

Most of the time, these spores lie dormant.

This fresh layer makes it harder for mold spores to regrow.

Avoid Overwatering

The main reason why seedlings develop mold in the first place is due to overwatering.

So if your seedlings have started to mold, its a clear sign that youre watering them too much.

see to it to not let your seedlings get so dry they wilt.

Switching from top-down to bottom watering can also reduce mold issues.

Leaving humidity domes after the seedlings germinate can increase the risk of mold and other seedling problems.

Turn Off Heating Mats

Seedling heating mats can helpplants like tomatoes germinate faster.

Space seedling trays a few inches apart.

Frequently Asked Questions

Seeds that develop mold before they germinate can still grow.

Seedlings typically develop white fuzz or mold when theyre grown in overly damp and humid conditions with poor airflow.

However, seeds may also sprout thread-like root hairs as a normal part of their growth cycle.

Damping off typically causes seedlings to develop thin, thread-like stems that rapidly collapse.

Will mold on peat pots harm my flower and vegetable seedlings?.

(2024, August 29).

  • Cooperative Extension: Garden and yard - University of Maine Cooperative Extension.

Cooperative Extension: Garden and Yard.

Grenfell, T. (n.d.).

Ask a Master Gardener: THE DREADED DAMPING OFF.