What is the Ph? I assume you are growing in dirt. Again I assume you are NOT over watering. What type and what level of nutrients are you using? What is your soil mix? (like, 60% Perlite 40% sterile soil no extra nutrients added.) DudeO was correct to think of spider mites or mildew only because you did not say what the white specks were first so itā??s natural to focus on the specks first..

If you would like some help please try to provide as much information on the setup and feeding habits you are using, light, Ph, ect so people donā??t waist their time guessing and can help you faster.

Just a thought