Looks like leaf miner damage. https://en.wikipedia.org/wiki/Leaf_miner

Trace element deficiencies like iron would yellow new growth up top. This damage is not nutritional. It’s from some pest sucking on your leaves.

I think you’ll start to see this as the growing market matures. I don’t know how viable it is to graft on old growth.<div>

I’ve seen a lot of grafted tomatoes finally hit the home grower in recent years.

If they find a root stock that thrives in DWC and allows for more salt tolerance… If the data supports it, why wouldn’t they graft? No…

Read more

Grafting perennials makes sense. Grafting annuals makes far less sense. Time is money.