Ask-a-Dave's-Gardener: What is wrong with my cucumber seedlings?, 2 by Goofygirl

Goofygirl wrote:
Hi Folks,

I\'ve been Googling all day, but I can\'t figure it out. Can anyone tell me why this happened to my cucumber seedlings. Two have formed tiny cucumbers even though they are not close to being mature and one has leaves that turned white. They were started from seed indoors, hardened off and transplanted on 4/17/16. They started out fine, but even when they were still indoors, they started looking stressed and growth slowed down. Now, at least two plants have \"died\" and two or three more look like they are going to follow same. I can\'t figure out the problem: disease, watering (under or over), fertilizer, lighting, soil. I used a sterile medium to sow the seeds (seed starting mix by Miracle Gro). They are also not the same variety of cucumber, so it can\'t be the seed packet either.