Cold hardy tropical fruit trees for Luisiana

Q: I've just moved to Louisiana and have been wondering whether it would make sense to plant some tropical fruit trees in our garden. Average lows in New Orleans are 41 deg F in January and February, although we did hit 25 once with the Arctic vortex. I'm interested in litchi, longan, rambutans, and persimmons. Do you have varieties that can tolerate Louisiana's temperature range? I'd love mangosteen but I don't suppose they will survive. Do you have any suggestions on tropical fruit trees that I could try?

A: Average temperatures are for statistics only; it is actual temperatures that may hurt your cold sensitive plant. This is what you should keep in mind when starting your tropical fruit collection:
1) Ultra-tropical plants like Rambutan can not survive winters below 45-50F. However, they can be successfully grown in containers in a greenhouse or moved indoors into a sun room during cold periods.
2) Tropical plants like Litchi and Longan may take some light frost once established. Still, for areas with freeze our advice is - keep them in pots and move inside in case of cold.
3) There is a number of subtropical fruit trees that are hardy enough to take some freeze. Persimmon, Feijoa, Fig, Cattley Guava, Jujube, Kiwi, some Eugenias and others. Please refer to our Tropical Fruit Sensitivity Chart.
4) Remember that plant's ability to survive winter depends on several factors, not only temperature itself. Important factors are: wind protection (chill wind kills rather than low temperature itself), exposure, how close the tree is planted to the house, plant maturity and its overall strength and health. If a plant had received good nutrients during summer, has well established root system, planted in enclosed area protected from winds and has plenty of bright sunlight - it has better chances to survive than a weak plant in warmer conditions.
5) Use SUNSHINE plant boosters for improving cold tolerance of your tropical plant. It only takes a few drops, and only costs $5!

Secrets of flowering of Jasmine Sambac

Q: Q: My Jasmine sambac Maid of Orleans is growing very fast and produced lots of branches and dark green leaves, when will I see flowers? I only saw 2 or 3 flowers since since Spring. I is planted by East wall of the house. Should I use some special fertilizer perhaps?

A: Jasmine sambac is a tropical bush or vine that enjoys hot summers. Since it tolerates wide range of light conditions, it can be grown both in shade or sun; this is why it is highly recommended for indoor culture where light level is limited. Remember though that profuse blooming directly depends on the light level. Your Eastern exposure location may not be providing enough light for the flowering. Dark green leaves are also a sign of a filtered light sitution. Extra fertilizing may not help to induce flowering if the light is low, although it is always beneficial for a plant (it may just start producing even more leaves and branches). The ideal conditions for Sambac's flowering are - full sun all day long, high temperatures (upper 80's-90's, even over 100F is fine), and very good drainage. Some gardeners call Jasmine sambac "almost a succulent", referring to its low watering needs. To be exact, this plant requires regular watering, but will produce lots of flowers only providing perfect drainage. You may never see flowers if the plant has wet feet or water-logging occurs. If your summers are rainy (like in Florida), make sure your jasmine is planted with at least 4-5"elevation and not in a low/wet spot.

See Top Tropicals Video about jasmine Sambac: - varieties, history and use.