you should never plant directly into hard pack. if you must, always dig your ole 2x-3x bigger and deeper than youll need. fill the hole about 1/3rd with various sized rocks, and then burlap or something similar on top of them ( the rocks) . fill the jole the rest of the way with a good premium potting soil and plant as usual.

as it stands now, you should be OK if they are outside as they will use the water and dispel the rest thru their leaves. besides youd be real suprised how fast that shit will suck the water up and dissipate it......if it worries you that much, dig them up and pot them and prep your holes correctly, but if you do pot them , leave them potted a minimum of 14 days before retransplanting them