I've had new sunleaves curl like that after using a bloom booster, forgot which one. Its not a big deal. As long as the bud isn't affected by it. They look good to me too. Sometimes funky shit happens when you change things, especially nutes. I agree with Shovel, probably the superthrive. But they still look good & I wouldn't sweat it. But hey, better to ask early than to be sorry later. I usually use nutes 1/2 strength when I first change over (or when I first start feeding seedlings). Then gradually increase to recomended dose. But then again, I use rich, but non-burning organics in my soil mix, so I really don't have to worry much about deficiencies. If it makes you feel any better, mine uncurled when I backed off the nutes, & you're doing better than you think you are! ~~~PEACE! ~~~

P.S. Damned! I keep forgetting it's hempy! So what I said about soil doesn't apply. But my statement about nutes still stands.