It's ground cherry I scanned it maybe I planted late but it's growing I'm happy with the results.

***** 03/05/2021 update *****

The plants appear to be thriving. I've added a picture of one over crowded pot. I will be planting them outside when the temperature stabilizes above 55 degrees Fahrenheit

For reference...

They have been kept in a southeasterly window. I acquired an LED grow lamp in January to supplement the natural light.

I also repurposed a turtle basking heat lamp for some seedlings I couldn't fit in the window. The heated lamp seemed to provide superior early growth.

We keep our house around 70 degrees.

I added water whenever the top of the soil looked dry; but I would water a bit less next time.

***** End of 03/05/2021 update *****

***** 12/19/2020 update *****
Sprouts are continuing to develop well!

***** End of 12/19/2020 update *****

Potting the seeds directly didn't work out for me, so I tried a few different methods for germinating the seeds. I have sprouts now, so the seeds were viable!

Here's the run down.

The blue passionfruit seeds seem to germinate best in sterile, warm (75 degrees), damp arrangements with no direct light.

It took 10 days to develop roots. Then it took another 10 days after potting to see the sprouts popping out of the dirt.

*Indirect/filtered light and airflow may also be important. More tests are needed.
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Recommended method for germinating many seeds:

(see pictures. Some are of this method used for pomegranate seeds)

Materials: Ziplock bags, Paper towels, Kettle or pot, seeds (wierd, right?), work surface and a sink. Tweezers for transporting into a pot after germinating.

1) Boil some water.

2) Fold your paper towels into thirds, and trim to fit in your ziplock bags (but don't place them in the bag yet!)

3) Pour the hot water over a paper towel and wait for it to come to a safe temperature.

4) Squeeze excess water from paper towel.

5) Flatten your paper towel, make sure it's still folded into thirds.

7) Unfold the top flap, and space your seeds evenly on the inner third.

8) Replace top flat back over the seeds.

9) Carefully place the paper towel in the zip lock bag

10) Inflate the zip lock bag with a turkey baster (or straw if you're not concerned with sterility)

11) Seal the bag.

12) Place the bag in an unlit cabinet or closet that stays at room temperature (though slightly warmer may be better!)

13) Check back in a week, and every the days after. (I started mine on Nov. 25, and had enough rooted seeds by Dec. 5)

14) When you stop seeing new roots showing up, move the seeds into a pot. Google soil/water recommendations

(I'm not experienced enough with the plant at this point)

I covered my rooted seeds under half an inch of loose soil and watered heavily and they just started to poke out (about 10 days after potting).
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Lazy, possibly superior method:

The sample size, and lack of controlled environment makes this method unproven, but... I placed 3 seeds in a paper towel, balled it up, and put it in a small clear glass of water on my window sill.

All 3 seeds germinated in roughly the same time as the bag method. The 100% germination rate makes me want to try again with more seeds.
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Methods tested:

Never having grown these before, I took several approaches to germinating sprouting them.

1) Placed 3 seeds in a glass of water on a sunny window sill. -- no luck.

2) Placed 3 seeds in paper towel and pour that paper towel in a glass of water on a sunny window sill. -- all 3 seeds developed roots

3) Sow 3 pairs of seeds, evenly spaced, directly in a medium pot. Placed in a sunny spot outside (temperature ranged from 40 to 85). No seeds sprouted after 30 days.

4) (two methods) Placed a dozen seeds on a folded paper towel. One layer of paper folder over the seeds. Soaked the paper towel and placed it in a zip lock bag. Inflate the plastic bag with a turkey baster (more sterile. Use a straw if you want) to ensure there's room to grow.

4a) placed bag on a sunny window sill. No seeds rooted

4b) placed bag in a rarely used room temperature (72 F) closet. 6 of 12 seeds rooted.

I moved the seeds that rooted into a pot and have some sprouts!

I was apprehensive about purchasing these seeds because of all the negative reviews. My seed pack came, and none of them seemed to be broken. I planted about 10 seeds per 4" pot, put them under my light and they all seem to be growing! I'm so excited!

So sad, I recieved them and started them right away. They never grew, I think maybe the seeds were old.

I planted 36 plugs (3, 12 plug trays) and used probably 100 seeds. Many germinated within 30 days but quickly died within 1-3 days (I think I kept them too wet). 3 plugs made it and are growing beautifully. My advice to grow successfully: with the plugs that made it, I removed the tray top cover as soon as I saw a tiny green sprout.

Can't wait to grow more next year and I'll make sure to remove the tray tops as soon I see a sprout.