home hydroponics organics grow lights nutrients shop now
Plant Diseases

Plant diseases or blights in a hydroponics garden are much less frequent than in a dirt garden because there is no dirt to grow bacteria. Not to mention the fact that many plant diseases travel to the plant from the surrounding soil.  Plant disease cannot occur without a host plant, a pathogen and favorable environmental conditions.

Plants can be more susceptible to disease if weakened by environmental conditions such as too much shade, high humidity and crowded conditions. They are also more susceptible when weakened by nutrient deficiency or toxicity (too many nutrients) and poor pH.

There will always be some trouble with disease, just watch for it and take care of it immediately. Unfortunately many disease cures involve the use of harsh chemicals which you really do not want on your plants. A hydroponics garden can easily collect such chemicals in the nutrient solution with indiscriminant use and get into the plant cells - not something you want.

What to do About Them

Try some less harsh solution first. My favorite all-purpose cure is to mix together water, baking soda, lemon juice and a very little dish detergent. I put this in a spray bottle and mist the affected parts of the plant. Sometimes it works like a charm and sometimes not. If you mix and use this recipe, make sure you cover all areas open to your nutrient solution or the dish detergent will get into it causing soap bubbles.
Powdery Mildew

Description: Fungus causing whitish spots on the underside of the leaves. Eventually the leaves shrivel and die. Thrives in high humidity.
Treatment: Spray with homemade all purpose cure described earlier.

Root Rot
Description: Fungus rots a plants roots.
Cut away rotted root portions and spray with a fungicide.


Early Blight
Description: Dark brown spots on leaves, stems and plant fruit seriously weakening the plant.
Treatment: Treat with harsh chemicals (
maneb, zineb).

Black Mold
Description: Sooty black or grayish white leaf growth.                
Gently wash leaves and scrape off mold.

Description: Fungus caused by over watering where leaves become marked with dark smears and shrivel. Hardly ever occurs in hydroponics plants
Treatment: Spray with fungicide and remove damaged leaves. 

Damping Off
Description: A fungus affecting small plants where stems meet soil causing them to fall over and die.
Treatment: Remove diseased sections. If it has affected a significant number of plants, replant in new soil and clean containers.


Description: Grayish white, fuzzy leaf growth caused by inadequate ventilation. Not common in hydroponics gardens.
Treatment: Increase ventilation and remove affected


Description: Slightly raised, powdery red pustules on the underside of the leaves causing them to turn yellow then brown and die. Helped along by high humidity. Very contagious.
Treatment: Apply harsh chemicals like zineb or maneb. 

Club Root

Description: Roots turn into a mass of club shaped tubers. Plants may become stunted.
Dust with fungicide

Crown and Stem Rot
Description: Fungus causes plant to turn pulpy and rot.
Treatment: Cu
t away rotted plant
portions and spray with a fungicide.

Learn More From Us

To learn more about Plant Diseases come in and talk to our knowledgeable staff and where you'll find more information. We can provide you with the solutions to rid yourself of these diseases and prevent future ones. Remember, whether you are our customer or a customer of one of our competitors, we are always here to help you.

Odds & Ends

Information You Might Need to Know

Why Indoor Gardening

How Indoor Gardening Works

How Plants Work

What to Grow

Identify Plant Deficiencies

Identify Plant Diseases

Feed Schedules

Herb Growing Times

Growing Tips

Converting Measurements

Growing and Lighting Glossary

Enhanced FAQ's


The products listed below are quick finds within our online store.
These products may also be found in our retail facility. Should you not find what you are looking for please call us and we will check our entire inventory.

Grow Bulbs
We carry all of the major brands of grow bulbs and great prices. Please check our supply and prices in or online store. Please call with any questions.  more

We can recommend the proper ballasts based on your requirements. See our complete inventory and pricing. Please call with any questions.

Call us today to find out what specials we are running on complete lighting systems. This is a great way to save money . Check our our complete line of ballasts in our online store.

Running low on nutrients. If you want special bulk pricing please call us and we will set a special price. Visit our online store to view our current nutrient supply.

Visit Our Online Store
Now you can shop twenty-four hours a day at our online facility. If you are local, you can still order and we will ship it to you or have it ready to go for pickup. Another way we are trying to help you.

Follow Us

For recent recent events and news at Hydro-Ponics