Very new to growing. I recieved these plants 4 weeks ago and transferred them to larger pots and used a potting soil. They have since tripled in size and have been very healthy up until this point.
The last couple days these spots appeared and are getting worse. Any ideas on what deficiency this could be?
I have been using regular tap water and wondering if it has made the soil acidic?
Thank you for the quick reply! I have checked behind all the leaves and don’t see anything, do you have any idea regarding type of pest? Or got to rid them?
Spider mites are very common. I grow indoors and am VERY careful about what plants I bring in the house. (I check the over carefully to avoid those %@$# spider mites).
Outdoors you can easily pick them up or other pest. A search in the forum for pest control should help as well as google and YouTube.
AAA gave solid advice. Best to know what you are dealing with so the cure is most effective.
@Reticence is a smart man! JK. As we both agree, it’s probably pests. When starting outdoors you will always have some pests, usually mother nature keeps a healthy balance, but when getting plants from another environment(indoors) there could be egg cases in a large proportion that have not been kept in check by all of the natural predators in a garden. Chances are once you get this break out under wraps, things will balance out. You will always lose something to the pests unless you are hyper vigilante.
In my neck of the woods, caterpillars the enemy. Spray with BT weekly to stop them
Likely pests. Could be: PH too low, cal mag needed. I would strongly suggest a slurry test of the soil using a decent PH meter and while you’re at it make sure you have a good TDS meter as well. Tap water needs to stand for 24 hours before use and should be PH’d into nominal soil range for cannabis: 6.3 to 6.8. If you aren’t doing this now it will bite you later. There are also micronutrients like silica that can toughen the plant and make it easier to fight off pests.
Look at a couple of lower leaves on the undersides of them up against the stem. Go ahead and remove the leaves so you can really examine them. Mites, FYI, are almost too small to see naked eye. You need a loupe.
If you look at the picture you can see some mites (purple) nestled into the tricomes of an earlier grow I had. I never saw them: just the web, until I got a digital otoscope and could see them moving.
I there are a few ways to treat it but I can’t say for sure the specifics . I know there are treatments from hydrogen peroxide to milk sprays . Put it in the search bar and you will see many recommendations for treatment. Good luck!