Straight, spiky yellow lines

Heya guys,

My Laughing Buddha which is planted in an outdoor 30l pot in premium Freedom Farms soil mix is struggling. I've never seen this type situation in a leaf where the edges have straight yellow lines and the leaf begins to spike at the edges. I'm not feeding nutrients just yet as the plant is only 4 weeks old so it's not nute burn. There are no mites on the underside of the leaves and the pre-mix should be ph neutral. Guessing this may be a nute deficiency of some kind. Does anyone have any guidance here?

how's the drainage in your pot? I'm thinking you have root issues.

Just re-potted it today into the big 30L pot. We did have some heavy rains though recently. The smaller pot had good drainage though and the soil mix, which is made for weed, also has good drainage. Can I treat root issues if that is the case?

drill lots and lots of holes. it could be a little shocked

Looks like there is a pH issue in the root zone.

Just ordered a soil PH meter so I will check and adjust if necessary. I'll report back to help close off the thread in a few weeks.