Gardenality.com · Gardenality Genius · Zone 8A · 10° to 15° F
Crimson Giant produces the largest flowers of any of the Sun Parasol series of mandevilla. I measured the one's on my vine at 5 inches across!

Gardenality.com · Gardenality Genius · Zone 8A · 10° to 15° F · Comment About Planting
In all but zones 10 and further south, Giant Crimson Mandevilla is a seasonal flowering vine that will not survive winters outdoors. But the profusion of giant red flowers produced make this fast growing flowering tropical vine a worthwhile annual to use in colder regions to climb trellises, arches, fences or other forms of support. When planted in a container the plant can be cut back some and brought indoors during the winter. When planting in the ground, choose a sunny location with well-drained soil. If your soil is heavy clay add some sand, gravel, sandy topsoil and/or soil conditioner at a 50/50 ratio with the soil moved from the planting hole.

Gardenality.com · Gardenality Genius · Zone 8A · 10° to 15° F · Comment About Pruning
Mandevilla does not require pruning however you can snip of vines that grow out of bounds. Use some type of support for this vine to climb on, such as a trellis.

Gardenality.com · Gardenality Genius · Zone 8A · 10° to 15° F · Comment About Feeding
I fertilize Mandevilla with a slow-release all-purpose flower fertilizer at planting time and again in mid-summer if necessary.

Gardenality.com · Gardenality Genius · Zone 8A · 10° to 15° F · Comment About Problems
Here in Georgia, where I grow Mandevilla seasonally, I haven't seen any serious insect or disease problems.