My Pot Leaves Are Covered With White Dust

By
Danny Danko
Dear Dan, My (outdoor) plants have flowered for a month now. The sun leaves have turning yellow. Lots of white dust on the buds. How much longer do I have before they are ready to harvest? – Julius S.

Dear Julius,
You have two alarming issues going on with your plants. First, the sun leaves (or fan leaves) shouldn’t be turning yellow after only a month of flowering. They should only start to show fall colors in the last two to three weeks of flowering so I’m thinking you may have a nitrogen deficiency or an issue with an imbalanced pH.

The second, and more disturbing, situation is the one you describe as “white dust” on the buds. If you’re talking about glandular trichomes (often referred to as crystals or resin glands) then you’re in the clear but if it truly looks like dust, you just might have an issue with powdery mildew. Take a closer look with a loupe or microscope to properly diagnose the problem. If you see tiny mushroom-like glands with a stalk and a bulbous head, it’s just the normally occurring trichomes that contain the desirable cannabinoids. If you see what still looks like dust particles, your problem is PM.

Have a grow question? Ask away at deardanko@hightimes.com
Danny Danko

Danny Danko is a writer, photographer and the Senior Cultivation Editor of High Times magazine. He has selected High Times’ annual Top 10 Strains of the Year since 2005 and is also the creator and founder of the High Times Seed Bank Hall of Fame, author of The Official High Times Field Guide to Marijuana Strains and the forthcoming book Cannabis: A Beginner's Guide to Growing Marijuana. He hosts the podcast High Times presents "Free Weed from Danny Danko."

By
Danny Danko

Recent Posts

Georgia Governor Signs Bill Establishing Licensing Requirements To Grow Hemp

The governor of Georgia signed a series of bills aimed at bolstering the state’s agriculture…

5 hours ago

Study: Psilocybin Enhances Meditation

For those seeking enlightenment through meditation, psilocybin might do the trick.

5 hours ago

Cannabis Community, Investors React to DEA Decision To Reschedule

Cannabis advocates hailed the DEA’s decision to reclassify marijuana under federal drugs laws, although many…

5 hours ago

Ohio GOP Lawmakers Debate Adult-Use MJ Priorities, Eye June for Regulation Approval

Ohio's recreational market remains in limbo, for now.

5 hours ago

Taylor Swift Puts Narcotics Into All of Her Songs on ‘The Tortured Poets Department’

On her latest album, the megastar is more open about substance abuse than ever before.

5 hours ago

MedMen Files for Bankruptcy

The once prominent cannabis company has now entered receivership, and its assets and operations will…

1 day ago