They sure look like they need some fertilizer, Max. I'd try the same as I recommended above, a watering can with half strength soluble fert and a tablespoon or two of Epsom salts added. Be sure it's well dissolved. See if that greens them up within a week or two.
Did you add fertilizer when you planted those? Some kind of slow-release pelleted fert is what you'd usually give a shrub for long term growth in a spot like that. (something that says "last for 4 months" on the label would be good for this summer unless you live in the South.
