Google it and check out a couple sites that sell it. They get pretty tall!

Skybird

Yes I did that which is why I am asking. Often there are several varieties of a plant, some taller, some shorter or there are regional differences as to how big they get.

A perfect example is purple aster. I brought some to my first swap and when someone asked a size question I tried to answer that they get 1.5 ft tall and were not garden thugs. But several people said they got 3-4 ft tall and spread miserably. Obviously someone had a different version of purple aster. I also have some 4 ft tall raspberry colored aster and some 3 ft tall white aster. None of which are thuggish in spreading. If someone asks how tall aster gets I have a different response for each one. In my bed I planted the purple in front, the white in the middle and the raspberry toward the back.

Somehow the red bee balm ended up in the front of my bed. Usually when I get a swap plant I ask how big it gets and then place accordingly. I just want to verify the placement of this particular plant. We have the perfect opportunity to move it this spring if it is misplaced.

When I was at Paulino's, all the different Monardas we carried got AT LEAST 2' tall in gallon pots when they were blooming, so I'm sure they got taller than that when they were growing in the ground. If there are any that are substantially shorter than that, I've never seen or heard of them.

Asters, on the other hand, are a different animal, and they come in many, many, many different species! They can range from alpine types that are only a few inches tall to some species that are several feet tall.

Possibly the person you got them from will see the post, but if I were planting it in my yard I'd assume the blooming height would be around 3'. But the height of any plant in a "specific" yard is determined so much by the individual conditions of light, soil, and water, that the only way to know for sure what it'll do in your yard, in the area where you have it planted, is to grow it for a year and see what happens. Chances are that if you have something 2' or less "behind it," it's gonna be taller than that.

Skybird

I am in the process of putting in an order at High Country Gardens so was perusing around to see reviews of plants I had. They have 2 types of red bee balm.

https://www.highcountrygardens.com/perennial-plants/monarda/monarda-fireball

Is 15-20" tall.

https://www.highcountrygardens.com/perennial-plants/monarda/monarda-jacob-cline

is 36-48" tall.

Usually I ask at a swap the height and place accordingly. This ended up in the front of a bed so likely is Fireball. I'm just attempting to verify before it really gets going.

Your right the person may or may not see this but if they do then that gives me some more info to place it in a good spot.

Even if it is the shorter one I'm thinking of moving it over to intermingle with some Autumn Joy Sedum since I think they would look good together.

Thanks Tomatoz! I think these are yours. We put them in the front of a bed with mostly pink, purples and whites. Since there is no other red I'm thinking of moving it to be in between some Autumn Joy Sedum. Do you have any pictures of your red bee balm plants in full bloom?

Sorry, mmmm12, i just searched through most of my garden photos and I have none of red bee balm. It looks like a darker red, like fireball, and is a terrific bee magnet.

My red bee balm is in a space of it's own, about 3'x3' and gets dug out to about 2'x2'.

I'll keep looking for photos, but the Google pics are spot on for the darker red color. Yes, I would probably move them from the front of the garden.

Thanks Tomatoz! We will likely move it after this next cold spell.

Bee balm also spreads fairly aggressively via rhizomes. So like tomatoz1 said digging out may be required.

We will definately be moving it. We only planted it after the fall swap last year so should be pretty easy to get it all up to our upper bed.