420 Magazine Background

WaVancouver's Guide to Foliar Feeding


Active Member

Folair feeding seems to be one of the easiest ways of increasing yield, growth speed, and quality in a well vented space, with or without elevated CO2 levels.
Just prepare a tea of worm castings, fish emulsion, bat guano, or most any other plant food right for the job and feed in the vegetative stage. It is not recommended for flowering, or you will be eating/smoking the sprayed-on material later. Stop foliar feeding when you begin your 12/12 light cycle.
I tend to wash off the leaves with distilled water once a week to prevent clogging the stomata of the leaves.

Feed daily or every other day.


Best times of day to Foliar feed are 7-10AM and after 5 in the evening.
This is because the stomata on the underside of the leaves are open then. Also, the best temperature is about 72 degrees, and over 80, they may not be open at all. So find the cooler part of the day if it's hot, and the warmer part of the day if it's cold out. You may need to spray at 2AM if that's the coolest time available.

The sprayer used should atomize the solution to a very fine mist; find your best sprayer and use it for this. Make sure the PH is between 7 and 6.2. Use baking soda to make the solution higher PH, and vinegar to make the solution lower PH. It's better to spray more often and use less, than to drench the plants infrequently.
Use a wetting agent to prevent the water from beading up, and thereby burning the leaves as they act as small prisms. MAKE SURE YOU FEED WITHOUT THE BULB ON! Spraying water onto a lit bulb can cause electrical shock and the very least, a shattered bulb.

Perhaps the best foliar feeding includes using seltzer water and plant food at the same time. This way, CO2 and nutrients are feed directly to the leaves in the same spray.

Foliar feeding is recognized in most of the literature as being a good way to get nutrients to the plant later when nutrient lockup problems could start to reduce intake from the roots.

WARNING!: It is important to wash leaves that are harvested before they are dried, if you intend to eat them, since they may have nitrate salts on them. This is why you 'flush' your plant before harvesting.


Active Member


New Member
can u folier feed with mirical grow? and what about lemon juice to bring the ph down for sparying? i also have someother liquid stuff was wondering if i culd use?


Active Member
Miracle grow isn't a good thing for MJ. Their soil is hideous as well. You can foliar feed with fertilizers and plant food. Lemon juice as well? I've never tried that before but if it works, let me know.


New Member
What dilution would you use Fish emusions @? Can you hurt a plant with too much foliar feed besides cloging the leaves?
Top Bottom