Crochet multicolor poncho with fringe. How to make (my thoughts).

 

Here is how I see it.

Now when I published it I see I made a mistake. Second row are 12 dc separated by 1 chain, not treble crochet, as I marked them.

Every whole flower connects with 6 others by petals.
Every other row you'll have to finish with half of a flower at both ends.
The whole poncho must be bordered  with a row of sc or dc plus fringe.
I used Sugar'n Cream yarn. It's pretty thick.
Hook 5 mm.

Cotton
Put-up: 2.00 oz / 56 g, 6 Balls / Package
Length: 95 yd / 86 m

The diameter of the flower is 11 cm ( about 4.5 inches) .
I measured about 50 cm from shoulder to waist. So yarn must be thinner to fit 5 flowers in that length.
If you do more than 7 chain for the last row, it might look even better especially if you use thick yarn like Sugar'n Cream, then it could be 4 flowers from shoulder down to waist.
Good luck!