What's This?

The margins are curling yet the tips are not curling up. I would say they are praying for Magnesium.

I'd be surprised if the problem were Mag. Super. They are straight in the ground in beds that are chock full of compost. Composting organic matter equals Mag. I'd be afraid to pour in some lime or epsom. Also leaves look healthy and green, not like in the pic.

Here is the latest pic. I cut off drip water supply and used some shade cloth to protect against heat, tho this week not as hot. Looks the same: twisted leaves, curling up (mostly the top leaves). To touch the leaves are not crispy, they're soft and they are green, no burn spots, yellowing, or necrosis. The plants in the bed just next door are not having the same problem. The soil is not soaked but still damp if I push my finger down. I should also mention that this plant is the runt, growth seems stunted and is about a foot shorter than the others. Help.

To recap:

"Neville's Haze growing outdoors, from seed, sprouted in late April. Made the soil myself of compost, rice hulls, and perlite. Watered daily on drip. No nute schedule (I rely on the compost during the veg stage), I ask them what they need and they usually tell me. I've applied an organic tea (1x) made from mostly bone meal and chicken manure one month ago. Also, have applied Fox Farm's Don't Bug Me, for the leaf eaters - Pyrethrum from chrysanthemum."