help im not sure what i should do here

ok ive read the little chart thats supposed to tell me what this is but i just cant tell, they are small plants about 6 weeks old most of the leaves have turned yellowish and are now starting to brown, what should i get for them? it could be the soil i bought im not sure of the quality of it.

also it has places of red all over parts of the stem

any pics might help

here are some pics

u got major problems if those are 6 weeks they look more like 2 weeks how often u watering them? those cups have drains wholes?

every 3 days now yes they have drain holes, its problly really 4 or 5 weeks and been starting to do this about a week or two ago and hast grown since