It's pretty late in the year to plant, really. It's customary to plant in the fall, and maybe late winter, however those plantings are difficult for some. Results are mixed, some good and some bad.
Getting seed is another problem at this time of year. You might be able to find some, however getting stratified seed that is ready for planting in april might well be difficult. Most seed sellers are out of the stratified seed, and some may well have non-stratified seed, these will not come up this year , if you get any. Expect to pay a lot for it, if you can find it.
Remember that it's a woodland crop, requiring special conditions to grow. You can go on Amazon.com and look for Dr Persons book, do some reading... maybe that can assist you in your future plans.
Dr Person's book is called \"American Ginseng, Green Gold\"
Although I plant most of my seed in the fall after one year of stratification, from time to time some seed gets held over one more winter in stratification, so doesn't get planted until spring. I've had success with both fall and spring planting. Although, spring planting is a bit more tedious, as many of the seeds tend to begin sprouting by the time it is warm enough to plant. Care must be taken to not damage the little roots coming out of the seeds.
Rather than risking purchase/planting of seed at this time, I'll suggest that you scout your planting areas and do whatever preparation you plan to do NOW. Then, come fall planting time, your efforts will be much easier!
If you already have your own seed in your stratification beds, go ahead and get it planted as quickly as possible!