Peters Professional what...? They make around 20 of 'em with different formula's. What are the N-P-K numbers on it, and how are you using it, and how often? Is the plant in veg, or flowering?

What lighting schedule are they on? Is this a schedule run by the sun, on timers, or do you bring it indoors when you get home from work?

What are the weather conditions where it grows? Hot and dry, warm and humid, hot and humid, hot-windy and humid...?
If hot, dry and windy, it's likely underwatering, which can 'droop' the leaves. Overwatering (my ladies) usually comes with yellowing and large greyish-brown blotches on the leaves. (early root-rot)

Altho it looks cool, those types of pots can be tricky to use for cannabis. Impossible to transplant, (narrower throat, won't let plant slip-out without root damage) and they seem to dry-out the soil quicker than the ones that are glazed. Then there's nutrient absorption into the ceramic, which may create future problems. Plastic is easier to work with, and is lighter to carry or move. This goes for non-cannabis houseplants, too.

Next time, if you have to use that pot, you'll probably want to fill it up to within an inch or two from the top. The soil level drops as the plant uptakes nutrients and organics, and soil compacts. If it drops too low, you'll end-up with low or no air circulation at top of soil. (a bad thing) Be sure to expose her to breezes, as this will help overall strength of the plant. (but keep an eye on soil moisture)

Don't know what nurseries are in your area, or what nutes they have, but if you want to go see what they have, we can tell you if it is an acceptable formula for cannabis.