by Alex Butova

As the world's health experts race to find a cure for the novel coronavirus, this drug have jumped to their attention - Chloroquine. It contains alkaloid Quinine, extracted from the bark of the Cinchona, or Fever Tree.
We receive many questions from our customers if we carry this plant. Although we do not offer it at the moment, we definitely can tell you more about this interesting medicinal plant!

If you like gin and tonic, you will be familiar with the bitter taste of the tonic which is provided by quinine. While it is now mainly used to add a flavor to our favorite tipple, the Cinchona tree bark once held a place as one of the most important drugs in history.
Cinchona was discovered in the 1630s as a treatment for malaria and, for 350 years, was the only effective cure known in Europe until synthetic replacements were developed in the 1940s. Malaria remains today one of the deadliest diseases known throughout the tropics, but up until the 20th century the disease was prevalent throughout Europe, including Britain.

The Cinchona tree is native to the Eastern slopes of the Andes with a range across Ecuador, Peru and Bolivia. Once the bark became an established medicine, particularly in the 18th and 19th centuries, demand started to outstrip supply. Threats of overharvesting and the desire to control the source of this precious bark drove various competing empires to source this plant for themselves. Understandably, the Spanish, who were in control of this area of South America, actively tried to prevent this, but failed to establish successful plantations themselves. A race to source and cultivate Cinchona ensued, and eventually both the Dutch, in Indonesia, and the British, in India, founded government controlled plantations for the mass production of quinine.

Chloroquine appears to have "broad-spectrum antiviral properties" and effects on immune response, and to be effective against severe acute respiratory syndrome... As the rest of the world, we are looking forward to the research results and hope the cure will be found soon!

In the meantime, let's just have more Gin-n-Tonic!

Tu BiShvat - New Year for Trees

By Alex Butova

Tu BiShvat is the Israeli Arbor Day, and it is often referred to by that name in international media. Ecological organizations have adopted the holiday to further environmental-awareness programs. The modern practices and interpretations of Tu BiShvat often revolve around the earth and environment. This holiday is a celebration of nature and appreciation for creating the natural world. In Israel, Tu BiShvat is celebrated as an agricultural holiday. The 15th of Tu BiShvat was celebrated this year on February 10, 2020. This day marked the beginning of a new year for trees. This day marks the season in which the earliest-blooming trees emerge from their winter sleep and begin a new fruit-bearing cycle. Often the date of Tu BiShvat is used for determining the age of fruit baring trees and therefore establishes their birth dates. Therefore, Tu BiShvat is the "birthday" of trees!

The traditions and customs of Tu BiShvat vary, however, the most common include planting trees and gathering with family and friends for a meal. It is celebrated by eating fruit, particularly the kinds that praise the bounty of the Holy Land: grapes, figs, pomegranates, almonds, dates, olives and others. It reminds people that "a man is a tree of the field", and reflects on the lessons we can derive from the botanical analogue.

Check out fruit trees and nuts:

Persimmon tree

Loquat tree

Ghost Cold Protection

Q: Has anyone ever tried using heat packs under frost blankets to protect tropical plants from frost?

A: The reality is, the heat packs used for shipping do not have enough heat capacity to create efficient warming effect. From our own experience, the best way is to use small 25W incandescent bulbs which produce lots of heat (considering observing all safety precautions and fire safety). Some gardeners use Christmas lights. See picture of our plants in the ground during a cold night. We called them Ghost Cold Protection! ;)

See more columns on cold protection:
Seven rules of cold protection for tropicals
About Cold Protection
Cold protection - winter action for your plant collection
Tropical Treasures articles

Seven rules of cold protection for tropicals

Q: I was always wondering how you guys manage to grow true tropical trees in Florida? I live in Puerto Rico and we have Breadfruit trees growing here in a wild... but my sister lives not far away from you, in Orlando, which is much colder, and I wonder if I can get her a Breadfruit tree for Christmas?

A: Your sister can grow a Breadfruit tree in Orlando either in a pot (and bring it indoors during cold periods) or in the ground inside a structure (an elclosed conservatory with heating system). See our customer's Greenhouse in Virginia. Cold protection of tropical plants is a lengthy subject and we have many interesting publications about it in our managine Tropical Treasures and on the website. In a nutshell, when growing tropicals outside of tropical climate, you need to follow these 7 rules:
1. Cut watering to a minimum. Cold+wet kills tropical roots.
2. Water thirsty plants before a cold night. Jucy leaves have fewer chances to be cold-zapped.
3. Wind protection is more important than a temperature drop. Plant tropicals close to a house or surrounded by other trees.
4. Duration of a cold period is more critical than the cold itself. If expecting long cold hours, bring up all available protection resources. Christmas lights or propane heaters - as long as there is a heat source, everything helps!
5. Remove plastic covers during the daytime so plants don't get "cooked" in the sun. Fabric covers are better than plastic.
6. Grow ultra-tropicals in containers and bring them inside the garage or even indoors during the cold.
7. Use SUNSHINE plant boosters and feed your plants well during Summer to improve cold hardiness.

Related topics:
About Cold Protection
Cold protection - winter action for your plant collection
Improving cold hardiness before winter: fertilizer and micro-elements
Cold hardy tropical fruit trees