Answer: Passiflora are South American natives, blooming only during warm weather. So if the spring and early summer are on the cool (wet, rainy) side in your garden, your plants won't begin to bloom until the temperatures warm up. That's usually August! Unless you have a particularly early summer with 75-80 degree days in June and July, your passion flower plants simply won't bloom any earlier, no matter how much you wish they would.
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