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Red passion flowers combine weirdness with color.

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Compared to the common passion flower, the three inch wide red passion flower, Passiflora manicata, is more colorful with cherry red flowers, but does not so prominently display the weirdly distended floral parts that passion flowers are known for. Bloom is not as profuse either, particularly among vigorous vines.
However, red passion flower vine has the advantages of somewhat more resilient and greener foliage, and sturdier vines that can climb almost to thirty feet high. It grows so vigorously that it can be surprisingly overwhelming, even if pruned severely or cut to the ground at the end of each winter. It is not so rampant in light shade.
Copies (new vines) are easy to propagate by layering, which involves merely burying a section of vine while still attached to the parent vine until it develops enough roots to be separated. The buried section should be at least a few inches long. At least a few inches of the tip of the vine should extend beyond the buried section.
The fruit of red passion flower vine is considered to be toxic, but often gets eaten anyway. Fortunately, fruit rarely develops.

All types of passion flower vines can be rare in nurseries. Red passion flower used to be one of the more rare types, but is probably as popular now as the once common white passion flower. #1 (one gallon) plants are the most practical because they get as big as #5 plants in only a few weeks, but are considerably less expensive. Larger plants take longer to get established, so get passed up by smaller but faster growing plants anyway.