The phrase "admittedly plenty" is correct and usable in written English.
It can be used when acknowledging a significant amount or quantity of something, often in a context where one is conceding a point.
Example: "Admittedly plenty of evidence supports the theory, but further research is still needed."
Alternatives: "undeniably a lot" or "certainly a significant amount".
There are, admittedly, plenty of great songs about London, such as "Guns of Brixton" by The Clash or "LDN" by Lily Allen, but the capital has always felt something of a separate country.
Admittedly, plenty of native invasives, such as bramble, ivy and bracken, give land managers headaches, but who among your gardening friends would welcome yet another "new" weed into their garden, when already battling with the likes of bindweed or ground elder?
There are, admittedly, plenty of instances where this is perfectly rational.
Now, admittedly plenty of us are really busy so maybe these responses are justified.
Australia took that brave step in 2011, admittedly with plenty of giveaways and exemptions for the early years.
The remarkable thing about America is how many big companies are expanding fast largely through organic growth (augmented, admittedly, by plenty of small acquisitions).
Then Trump wins North Carolina, where there admittedly are plenty of white Republican voters, where Republican efforts to quash voting have succeeded and, let's be honest, if Barack Obama lost it in 2012, how was Hillary Clinton supposed to win it?
I admittedly have plenty of gaps in my crypto knowledge, but I've triple-checked this with people who know considerably more about this topic than I. Before we dive in to the deeper stuff, you've got to understand one overarching concept at play here.
Admittedly, there is plenty to get one's teeth into, particularly surrounding the contents of her autobiography.
Admittedly, there is plenty of high quality television now produced in the US, and there are numerous ways to watch it.
Admittedly, there are plenty of ways around such margin requirements these days, which require investors to put up half the purchase price in cash.
