I doubt you will have any problems, especially since your soil is sandy. What you did do, was spend more money than you really needed to, since potting soil is usually more expensive. I would just keep a close eye on what you've planted, and your flowers will let you know if they are unhappy. Relax and enjoy your new yard! Remember that you should never be "finished" with your gardens. They should be ever evolving environments!!

thanks tasymo! I just breathed a sign of relief when I read your response.

I will keep an eye on these. I also planted some tall phlox which is not in bloom yet and they look good with the exception of one that didn't look so great. We just had torrential rain for the past couple days... so I am hoping that might be why one is looking a little haggard....

Don't you worry about it Tara! There isn't anything in potting soil that should hurt anything. Potting soil really isn't soil so much as a mix of peat, vermiculite, and either compost or mulch.
But next time you start digging or amending the soil go with bags of compost, as it has more nutrients.
One of the best investments you can make in buying a composter. Just throw in your veggie scraps (peelings, rinds, etc), leaves, any extra soil and you are cookin'! You can always buy bagged compost, but it is cheaper to make your own!
Take care.
CMK

I agree with the other posters that you shouldn't really have any problems with what you've already planted. The areas with mostly potting soil will likely dry out more slowly than the surrounding sandy soil, so keep this in mind when watering (and avoiding overwatering - check the soil around your plants a couple of inches down to see what conditions are in the planting hole).

Compost is an excellent amendment, if you can find a good source, like a soil supplier who deals in bulk compost. Starting your own compost pile is a good idea too.
One potential problem with using bagged potting soil, in addition to the expense, is that in mixes containing lightweight materials like perlite, the stuff will tend to rise to the soil surface with repeated waterings, and can look unsightly. This is really just a cosmetic problem, though.

I don't see a problem with it either other than expense. Most of my plants would do better if I did that, just that it costs too much more.

I asked my daughter to pick me up 2 bags of Miracle Gro for potting and 2 bags of topsoil. She came back with the Mir Gro but another brand of potting soil, didn't know the difference. Rather than the hassle of exchange, I'll just use it in or out.

The only problem I see is how deep you went. Plants that sink deep roots might be fooled by the super rich soil on top, then I don't know what they would do, form shallower roots to take advantage of the richer soil or go deeper and suffer culture shock. The added nutrients will trickle down to some extent.

Or not miss a beat. Plants are funny. People did not used to fuss like we do now, and stuff still grew, depended on rainfall for water like most midwest farmers do now. I think some of us try to grow things that our forebears might not have; they went tried and true. We want to grow some plants that are fussier and ones that weren't available then.

The only thing I remember is that my father used to rotate crops. Somewhere I read that if you have problem soil, plant buckwheat for one growing season. It'll loosen it up and condition it.

And when you improve soil, you improve a bed, not just holes in the existing soil.

Tara, no worries, everything will be fine. I know how you feel though. I had been using potting soil for awhile and didn't realize I was wasting money but almost all of my plants are thriving, so no real harm done. Don't dig anything out. I think the reason they call it "potting soil" is that basically it would be too expensive to use the quantities you need outdoors in all the beds, so most people use it for houseplants indoors only. But I guess I was a moron too! LOL