The Rangers boss is keen for a trio of youngsters to spend time away from Ibrox this season.
Rangers boss Warburton
Warburton has added eight new faces to the side which won the Scottish Championship at a canter last term, and is looking to take that tally into double figures before the close of the summer transfer window.
The arrival of 21-year-old Leicester striker Joe Dodoo is imminent, Warburton admitted, with another striker and centre-back left on the Englishman's shortlist.
Dodoo is set to sign following a successful trial
Those additions would leave Rangers with a squad pushing 30 players and Warburton revealed he is keen to trim his ranks by loaning out a trio of Light Blues prospects.
"We want the young ones to go out and play as we did last year," the 53-year-old said, as quoted by the Daily Mail. "The under-20s environment doesn't suit so we want the young talents to go out on loan - the likes of Jordan Thompson, Ryan Hardie, Tom Walsh.
"I think they will benefit from that and come back to Rangers better players."
Both Hardie and Walsh were loaned out to Championship clubs last term, while Thompson enjoyed a brief spell at League One side Airdrie.
Walsh started last week's friendly win against Charleston Battery
The latter pair will be particularly keen to impress this season, with both their contracts up next summer, while Hardie has two years to run on his.
Miller is one of the most high profile players nearing the end of his Rangers contract