Passiflora periesii is one of the many wonderful everblooming passiflora varieties. They all more or less require the same conditions, though some are more needy than others.
Passiflora periesii is a large showy passiflora. The flowers only last a day and they tend to open consecutively along the stem. When your plant gets large enough, it will be continuously covered with flowers.
The higher the light/heat/humidity/soil richness the more you will get out of your plant. This plant requires room and support to climb on. Extremely showy and very rewarding to grow. Even thought each flower last a day, it makes such a beautiful sight to see. The flowers are such an intense bright red color, they almost seem to glow. They are also very large and look almost unreal.
Water when the plant when the soil approaches dryness. If the temperatures are high, water the plant more generously. Passionflowers generally like a lot of sun, heat, water, fertilizer and humidity. Pretty much a lot of everything. During the winter reduce the amount of water appropriately.
You can find more information and tips on watering here.
The more the better! Passiflora piresii will flower on an east or west window, but it will do the best on a south facing window. The picture on the right shows Passiflora piressi flowering on a small east facing window. If you have the opportunity, grow it outside in full sun during the warmer months. Supplementing it with grow lights during the winter will help to get more growth and flowers during these dark times. If I had southeast floor to ceiling corner windows (the next best thing after an actual greenhouse) I would have tons of ever blooming passionflowers!
This plant prefers higher humidity, though will tolerate lower as well. If the humidity is too low the corners of the leaves will dry up, and the flower buds may fail to open.
You can read more about humidity and tips to maintain it here.
Soil Type and Fertilizer:
Passionflowers like rich soil mixes, neutral to slightly acidic, that are freely draining. Some varieties can tolerate a wide range of soil conditions, others are more fussy. When I re-pot my passifloras in the spring I like to mix in general potting mix with some peat moss and a bit of fully composted cow manure to get the pH slightly up and add plenty of organic richness to the soil. I also add perlite or sand to insure the soil is freely draining. Generic fertilizer applied at half strength regularly throughout the growing season seems to do the job. If the plant leaves turn paler, the plant is either not getting enough nutrient, not enough light, or is missing minerals.
Can be easily propagated though cuttings or seeds. Cuttings is preferable as the plant will come into flower as soon as it gets big enough. If you grow your plant from seeds it may be years before your plant matures enough to start flowering.
Other Care Tips and Personal Observations:
This is a large leafed vine with big flowers that requires quite a bit of support. Shaping pruning and wrapping back onto the trellis is essential to keep this plant in a good shape, well branched and looking good.
The higher the light the better. It’s interesting how the plant forms buds up along the branches in a way that would allow the flowers to open one a day. The leaves are big and darker green, beautifully contrasting the flowers. Passiflora piresii flowers don’t have a sent.