Struggling brandywines

[Salaam]

There was a seedling shortage this year, and as I was out of town, my excellent friend scrounged up what he could. These were the only two brandywines he found. I planted them around June 10 or so. But they're struggling and of course I've got no idea why. Soil is good and was well prepared. My tomato plants do usually struggle towards August or so, but not so early. I've just given them some liquid fertilizer... Let's see.