Two feet apart is likely a bit close, especially right next to your house. It's not necessarily to the point of the hydrangea failing, but becoming crowded. It's always best to have shrubs have a couple feet of clearance near the walls of the house.

It is really not possible to give you a detailed answer without knowing what type of variety that you bought. Some hydrangeas can grow to be very large (at like 10 feet). The average spacing for many might be 5-6 feet apart. If it looks like "Endless Summer" it is probably a big leaf variety. These can also vary but Endless Summer itself is planted about 3-5 feet apart. This is a newer variety that can bloom on both new (made this growing season) and old (made last season). The older types bloom only on old wood and if winters are harsh the plants will now bloom the following summer. Do you have any plant tag at all? Maybe check Lowes website and see what they typically carry.

At any rate, it is probably a good idea to lift some of them and increase their distance. You can still group them how you like- and that sounds like you'd want not a straight line, but in groups of 3 or five. 

The good news is they've not been in the ground long, and regardless, Hydrangea tend to have shallow roots, making them easy to transplant.

If you went all the way around the house, consider that they may not do as well in all areas.

 It will be a good idea to mulch these plants (2-3 inches, not touching the stems), and even more in your Washington County winters. In the coldest Maryland winters, these plants are sometimes killed back to the ground or even completely through the roots.

Christine 

Be sure to keep these thirsty plants well watered throughout their establishment of the first 18 to 24 months in the ground.

CM

Ah, so after searching the Lowe’s site I can confirm I bought the Monrovia Hydrangeas and the blue ones I got I remembered the scientific name and can confirm they are Big Leaf variety. 

So, if I were to dig up every other hydrangea, and plant them other places, will this be okay? This would then make them 4 feet apart each. I actually put additional soil on them after planting and also mulched to keep moisture in. Watering twice a day on hot days if I notice the soil isn’t super damp by 2pm after morning water. I have the little feed balls and other products for nutrients and have previously pruned the dead heads once they died. I read not to remove the dead wood until after 2 years since they are newer plants and to not cause so much stress on them, they were a little freaked after I first planted them. 

I do have an area where I can take up older bushes that died from transplanting to put the extra hydrangeas in. Another note: I noticed in a few spots there is the red clay type of soil, should I take this up and put a less hardy soil? I am open to any ideas. 

Attached is the image of the goal

I am trying to reproduce. I can take a photo of how they are currently if needed. This is the closest I’ve gone after googling for a long time to knowing anyone who knows anything about these plants. Thank you for your time. I truly appreciate it. 

That sounds like a good plan. Monrovia is a large and well-known plant nursery. It looks like they don't label their plants with the cultivar variety name so we still have no way of knowing how large they will be.

Here is our page on pruning hydrangea (which you are right, is not needed for a long time if at all, other than the spent flower heads):

https://extension.umd.edu/hgic/topics/guide-pruning-hydrangeas

An interesting fact about most if not all of the big leaf varieties   in case you didn't know is that the flower color can be changed towards blue or pink (and interim purple) depending on how acidic the soil is. Once you know you can change the soil, hence flower color based on which fertilizer is applied.

One last note: don't pile lots of soil or mulch above the crown of the plant which can smother roots. Pull mulch back from contact with the stems too.

Christine