i am experiencing powdery mildew on an indoor grow for the first time. does anyone have any good methods of killing it. 4 plants are in flower ortega and ogre both clones any thoughts experience or advise welcome time is of the essence thanks.

Serenade
Baking Soda / Water Mix
Sulfur Burner
Some people recommend Neem oil, but do not use in conjunction with sulfur vaporization.

I would start with Serenade.

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thank you. what is the active ingredient in seranade and is baking soda as effective? +rep thanks again

ya i got the same problem with my first indoor grow. ima try the backing soda but whats seranade?

i wonder only because im broke right now so if the baking soda works as well as the seranade im going that route. evidently the baking soda raises the p.h. of the surface of the vegetation to around 7 making it unlivable for the p.mildew.

heres what the serenade bottle says:

0.0074% QST 713 strain of Bacillus subtilis (information here)
99.926% inert ingredients.

It controls bacterial spot, powdery mildew, rust, gray mold, leaf blight, scab.

Baking soda does not work as well as Serenade, Baking soda WILL change the pH on the surface of the plant- but Serenade does that, and introduces this Bacillus subtilis which is like having your own army of evil henchmen that attack cannabis mildew/fungal pests.

Urban Garden Supply in Woodland Hills, CA carries the product for $9.95 per bottle, and comes in a handy spray bottle... I apply to areas effected, where you can see the fuzzy mildew forming, and it immediately correct the issue on that part of the plant, and prevent it from returning.


Do not wash down your plants, water and spray plants with the mixture (either baking soda, or serenade) AS SOON AS THE LIGHTS COME ON to prevent moisture from remaining when the light goes off.

Increase air circulation in the grow, space plants further apart- add another oscillating fan to blow the plants... Walmart has one for $17.00 right now, easy to set up- and works very well and quiet.

Spray your serenade or baking soda mixture as you notice the powdery mildew
Check for powdery mildew EVERY water and feed or every 3 days.

Serenade can be used up to the day of harvest, and is safe to use.

BUT I MUST WARN YOU - SERENADE SMELLS LIKE NASTY FEET. Of course, nasty feet beat the hell out of having PM on your plants.

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ok thanks the bacterial approach is obviously the better choice woodland hills is not far for me ill check it out peace.

Do you just bicycle around town?

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yeah 200 to 300 miles a week 12000 or so a year. keeps me sane most the time lol.

ok so got seranade at foothill hydro in burbank $12.95 so basically i spray down all foliage at 7 day intervals correct? as its a bacterial product i assume overdose is not possible. the mystery is this i looked into causes of powdery mildew high moisture poor circulation cramped plants low light etc.. my grow is very well ventilated with 2 swiveling fans low moisture and has none of the obvious problems associated with powdery mildew oh well weird. anyways i will apply tomorrow question how damaging is this disease and how quick does it cause problems as of now the plants look perfect aside from the white mildew mostly visible on the fan leaves? thanks hydro tech.