Proper Use of Foliar Sprays

Mar 1, 2016 | Horticulture Tips

While not a substitute for healthy soil, foliar sprays are an effective way to supplement the nutritional needs of your cannabis plants. To properly use and fully benefit from your foliar sprays, keep these notes in mind:

  • Foliar feeding should be done in the early morning or late evening, and in temperatures below 75°F (24°C), since heat causes leaves’ pores (stomata) to close.
  • The underside of leaves have more stomata because less evaporation will take place in the cooler, shady underside. This means that it is important to also spray the undersides of the leaves, not just the top.
  • Clones and plants in the vegetative stage will greatly benefit from foliar feeding. Since clones have no roots, they will extremely benefit from foliar sprays as it will aid the rooting process.
  • It is recommended to avoid using foliar sprays during the flowering stage of your cannabis plant. Spraying flowers will increase their chance of developing a mold or mildew. If you need to spray during the flowering stage, it is important to keep the lights off/temperature down and to keep an eye on your flowers.
  • Plants absorb nutrients through the bottom of the leaf much quicker than they do through the roots and stem.
  • Foliar sprays are typically less concentrated than soil fertilizers.
  • Fertilizers applied via foliar sprays are more effective and faster than when it is applied to the soil. However, foliar sprays are only short-term solutions for stressed plants. It’s important to remember to also pH and test the ppm of your soil runoff to determine the health of your soil and to make the appropriate changes to your reservoir/feedings.
  • Natural compounds used in sprays such as milk, kelp, compost Teas, and fish emulsion are also very beneficial.
  • Insecticidal soap and other surfactants can be used as a wetting agent to help the foliar application spread and stick to plants.
  • The pH of your foliar sprays should be slightly acidic (~5.8) to allow the solution to easily penetrate the cuticle (due to the complex electrostatic repulsion and attraction phenomena, which is regulated by pH within the cuticle) and be absorbed by the leaves. The optimum pH will vary with each nutrient and strain of plant.

 

  • Atomized spray nozzles are recommended as misty sprays are more efficient and will allow for better absorption and coverage. Sprays that aren’t misty won’t be as easily absorbed by the plant.

Read More Posts

“American Pot Story: Oaksterdam” Wins Audience Choice Award

“American Pot Story: Oaksterdam” Wins Audience Choice Award

New Love Films and Oaksterdam University are proud to announce the feature documentary American Pot Story: Oaksterdam took home the prestigious ”Unstoppable” Audience Award on Jan. 26, 2023, after its world premiere at the Slamdance Film Festival, Jan. 20-26 in Park City and Salt Lake City, Utah.

Part of the festival’s annual Sparky Awards, the Audience Awards are among the most coveted because they are voted on by Slamdance attendees, reflecting fan favorites and setting the stage for future film festival appearances and commercial success.

Are All Weed Colleges and Cannabis Certifications the Same?

Are All Weed Colleges and Cannabis Certifications the Same?

Adult-use cannabis is a massive market that will continue to grow over the next decade. The industry's growth means more job opportunities and career paths for individuals ready to fill those roles. One of the best ways to prepare for a job in the cannabis industry is...

“American Pot Story: Oaksterdam” World Premiere at Slamdance 2023

“American Pot Story: Oaksterdam” World Premiere at Slamdance 2023

You’re invited to the world premiere of the documentary American Pot Story: Oaksterdam at the world-famous Slamdance Film Festival in Utah.

OU Executive Chancellor Dale Sky Jones and OU Faculty Jeff Jones will be in attendance at the screenings.

There will be a panel discussion with LEAP’s Diane Goldstein and Weldon Angelos and an after-party hosted by TRUCE Utah and Dragonfly Wellness.

Come out and celebrate a momentous occasion with us if you are in the area!

Oaksterdam Newsletter

Stay Connected. Join the Movement.
Sign up to receive email updates for more opportunities like this, cannabis job postings, events, and more.

Signing up indicates your consent to our Terms and Conditions and Privacy Policy