Thanks for the response, Ive watched quite a few videos on dutch aquascapes, I guess my question is more towards how do I make a tank that is that tall look good with a dutch aquascape, or how do I even get plants that tall? Yes I'm running pressurized co2 with a diffuser into the filter intake. I'm also in a bit of a predicament with my ferts, Ive never really paid much attention to ferts but have recently and want to get into EI dosing but don't know exactly what to get.
IMO you are putting the cart before the horse.
Before you even begin thinking about creating a dutch scape, you should spend some time learning about growing plants.
A planted tank is a combination of light (PAR/Color), CO2 (pH drop), Ferts (NO3/PO4/K/Fe/micros), and maintenance (might be most important). You want to optimize each to have the best chance of growing healthy happy plants.
Here's a good place to learn the basics and all the terms and words that are commonly used in the hobby.
Another good way to learn is to find tanks that have similar goals to your own and demonstrate success. Then study their methods. It will give you a good idea of what it takes to be successful.
But in general, a 90 is not too tall, and 4 x T5HO will be medium to medium high light, depending on the actual bulbs.
IME, the more research you do prior to getting started the better your odds are.