I am new to growing and have some plants a friend gave to me. They are still in Veg state under 600W lamp. They are about 6 weeks old (I think). The room is at 75 degrees. I have to water about once every 5 days. There is a fan and air filter/purifier in the room. The pH level is at around 7-8. The pH meter is a little crude though.
I use Rhizotonic and Bio Vega (Canna products) as recommended by my friend. I apply the recommended amounts per instructions. I allow the water temp to aclimatize also.
I have yellow spots on the leaves as shown. Some of the tips are curling downward also. Would appreciate some advice here.