Vitamin B-1

I went to longs and bough "Vitamin B-1" to use on my plants

its a bubblegum strain and 2 weeks and 3 days old. The bottle says,

"for root growth and reduces transplant shock"

It contains

Iron - 0.125%

Manganese - 0.125%

Zinc - 0.125%

Vitamin B-1 - 0.01%

The directions say for potted plants put a table spoon in a gallon of water

how much should i water it and how often

also is this good stuff will it make my plant do well?

i watched a video i think cloned plants get 200milli leters of water each day until they begin flowering then every other day

i found some at my house today as well, but am not sure how to use to, hopefully some one will tell us when and how to use it