I thought perhaps by potted , you meant the little plastic pot's that plant's sometimes come in.
Plant's root's need to be able to spread out and draw nutrient's from substrate as well as nutrient's that you may add via liquids, (see flourish comprehensive plant supplement by Seachem).
You can plant in pot's but you might consider either using potting soil in the bottom of pot about 2/3 full ,stick the plant in,and then cover the soil with fine gravel (or sand).
Root tabs can be placed in the pot as well as under plant's placed in sand without pot's.(once a month)
Pleco isn't gonna hurt anything by digging him/herself a place to rest but may uproot plant's while foraging around the tank in search of food after dark (is what they do) and their size alone, can make it hard sometimes keeping plant's rooted . Would see that the pleco has food avaiable regularly and perhaps place a slice of zuchinni ,sweet potato, Romain lettuce, a couple times a week in the tank in addition to foods that it will scavenge that are being offered to other fishes.Might place zuchinni and sweet potato in small dish of water and put it in microwave for 30 to 40 seconds to soften it up a bit before placing it in the aquarium.
If you do this after lights off for the day,, he/she may leave plant's alone.
Research plant's before buying to see what light they may need and whether or not they are true aquatic plant's. some plant's offered at chain stores labeled as.. aquatic may or may not be .
I did note what looks to be Java Fern
? planted in substrate to left of pleco in last photo. This is a easy low light to moderate light plant but will do a bit better by attaching it to the wood or a rock with thread or fishing line as opposed to being planted in substrate. The roots will over time,,attach to the wood or rock (not so much smooth rocks) and draws it's nutrient's from the water which is why product like Flourish comprehensive by Seachem is good idea for it will benefit ALL of the plant's especially...those like Java Fern
and or anubia.
I might keep the water level in the tank up to the level of trim on the tank to help prevent CO2 produced by fishes and bacterial activity from escaping the tank too quickly such as happens when there is too much surface disturbance from water returning from filter through spray bar above the surface, or return flow from Hang on the Back filter's in water fall type fashion.
Might run bubbler's and or sponge filter at night when plant's use up oxygen and leave then off during eight to ten hour lighting period during the day when plant's are scavenging CO2 available.
Lastly,, I would buy as many plant's that will thrive in low to moderate light as I could cram in the tank. some will take off and other's maybe not ,but by heavily planting the tank from the outset, (maybe no more than 15 percent of open substrate area) and by placing lights on strict eight or ten hour lighting period,,Algae will have a tougher time taking hold. Waste from fishes can be utilized by plant's and the need for vaccuming the substrate is greatly reduced.