Pink lychee

Okay so the goal is to grow indoor for the first month. Then put them outside beginning of June. Location Switzerland. I watered the the pots when I transferred the rockwool into the pots. I put voodoo juice 1ml/L. Didn’t water them for 3 days. Sorbetto: looks normal, quite good grape inferno 1: the tallest yet looks healthy Grape inferno 2: the slowest but not abnormal for the moment Pink: looks good I had some fungus gnats so I put some vinegar with soap in a bottle, didn’t work at all Day 6 post germination : added some yellow traps it seem to work I use a 150 watt HPS light It’s 60cm high from the top of the pots PPFD : 250 - 350 measures with app Photone and iPhone 14