Some of the leaves on my plant are getting these dry tips with sort of yellowish spots. What causes this?
this post was submitted on 01 Jun 2025
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Also, sorry, just to add. Over-watering, having the medium wet all the time. Will massively reduce growth. You want Co2 at the leaves and oxygen at the roots. If it's wet all the time it just won't grow, you gotta let them dry out between fertigating. Pick up the pot, if it feels light, water it.
No apologies at all, I appreciate all the help. So lots of light and a bit of dry time between waterings is best, right?
Simplicity is everything. Light is a different school of thought. For indoor growing if you're not adding Co2 a PAR of around 800 is sufficient, if you're using a PAR meter. You can get away with a Lux meter (30 euro about) with a reading of about 70,000 if you're using white LED's, so, full spectrum grow lights. For the blue-purple LEDs you have to use a PAR meter. Which is substantially more expensive than a lux meter, but you can get a cheap one for a couple hundred euros. If you're not at the stage where you want to buy a meter to measure the light. Just keep it at a distance so the plant doesn't bleach. That's the breakdown of chlorophyll which is the green pigment responsible for photosynthesis. If it's natural light, just leave it be.