I’ve seen such roses (but in smaller sizes) used in Irish crochet. The idea is not complicated, and I was able to come up with my own pattern. For the roses shown, I used cotton yarn (can’t tell the size and brand as it’s been in my stash forever).
I can picture a beautiful cushion with such rose bouquet on it. Another idea would be a table runner; something similar to this one. Or, perhaps, these roses could be incorporated into a gorgeous afghan (that would be a lot of work though).
As you can see from the pattern, I used different amount of double crochets (15, 16, 17, and 18) for the petals. That’s because I wanted the petals to be of different sizes. Also the place where the petals are attached with a slip stitch can be slightly different.
You may end up with a bit of chain left, which is not enough to make a petal. In that case, just wave it in on the wrong side of the rose.
Center: Sl st in 8th ch from hook. Ch 1, 17 dc in ring, hdc in ring.
In the following instructions dc and hdc should be worked around the chain.
Petal 1: hdc, 15 dc, hdc around ch. Sl st in 7th dc of ring.
Petal 2: ch 1, hdc, 17 dc, hdc. Sl st in 7th dc from last sl st.
Petal 3: ch 1, hdc, 18 dc, hdc. Sl st in 6th dc of Petal 1.
Petal 4: ch 1, hdc, 18 dc, hdc. Sl st in 2nd dc of Petal 2.
Petal 5: ch 1, hdc, 15 dc, hdc. Sl st in 10th dc from last sl st.
Petal 6: ch 1, hdc, 16 dc, hdc. Sl st in 6th dc of Petal 3.
Petal 7: ch 1, hdc, 15 dc, hdc. Sl st in 11th dc from last sl st.
Petal 8: ch 1, hdc, 17 dc, hdc. Sl st in 11th dc of Petal 4.
Petal 9: ch 1, hdc, 15 dc, hdc (If you used up all the chain, make this last hdc into last ch, but if you have a bit of chain left make this hdc around ch). Sl st in 4th dc of Petal 5.
Fasten off. If you have a small amount of chain left, wave it in on the wrong side of the rose.
If you need crochet leaves to go with your roses, you might want to check out these patterns:
Crochet Patterns from my Shop