Is she a lost cause?

It is platinum og kush and we transplanted her into a 5 gallon bucket of fox farm ocean Forrest with 5 other plants under 400w hps 24/0 8 days ago. The other 5 are growing about 1/2 an inch every day she has only grown 1/2 an inch total. Her roots were not great when we transplanted her. We are trying to hopefully save her. We just started botanicare kind nutrients the base and grow at 1/4 the dosage. Should we give up on her or keep trying to get her going. Any tips on something that can get her going? I'll put a picture of our others so you can see the difference.

with the smaller plants they tend to get less light and have a small root mass so they need to be watered less often than the bigger plants
this is where a lot of growers mess up, they water all the plants at the same time so the small plants are getting over water often, this stunts the growth
best thing to do is lift the plant up so the plant canopy is 1-2" above the rest, give it the best spot directly under the light and only water her when the soil is nearly dry, this will give her the boast she needs

How far away do you have the lamp? should only be about 12/15 inch from the tops of the plants. other than that it(all)looks alright.

If it were me, with the number of plants in that space, I might just consider removing her. No harm in seeing if she'll catch up some before space runs out though.

Just an update on her...we decided to keep her in see what would happen she's caught up really well very full and still growing. She's in day 8 of flowering