Garden Blog - Top Tropicals

Date: 6 Dec 2018

Seven rules of cold protection for tropicals

TopTropicals.com

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

Date: 26 Jan 2022

Don't miss this one:
PodCast Premiere!

Episode 1
How to Protect Tropical plants in Winter: Q & A

Featuring Horticulturist Mark Hooten

...We are introducing our new Series: Top Tropicals Podcast. Growing tropicals and pushing the limits. Watch the first episode:

How to Protect Tropical plants in Winter

...Who doesn't like tropical beauty? Everyone wants tropical plants. But not everyone lives in a warm climate. Is it possible to grow tropicals outside of Tropics?
Top Tropicals horticulturist Mark Hooten, who is well known to many gardeners as the Garden Doc with his Saturday Plant Clinic, is answering gardeners' questions about how to prepare and protect tropical plants during winter...

Premiere scheduled:
Thursday, January 27, 8:00 AM

More about cold hardiness and cold protection:

Cold hardy tropical fruit trees
Growing Stephanotis and cold protection
Cold protection of tropical container plants
Plumeria cold protection
Ghost Cold Protection
Seven rules of cold protection for tropicals
Improving cold hardiness before winter: fertilizer and micro-elements
3D garden ideas and winter cold protection
Cold protection - winter action for your plant collection
About Cold Protection

Date: 29 Nov 2020

Cold protection of tropical container plants

Q: I am long time customer of yours, I live in San Diego California and while the summer and Fall temperatures are warm to mild, the winter temperatures dip to a point where some tropicals die off. We are experimenting with different variations of way to heat and insulate the pots we have the tropicals planted in as a way to keep them alive during the colder winter months. I was wondering if you knew of the ideal soil temperature for these tropical in order to look their best year round. All of the heaters we have installed have thermostats and temperature adjustments so we can now keep the soil anywhere between a range of between 65-75 degrees. Any advise you can provide would be greatly appreciated.

A: This is a very interesting concept you are working with. Indeed, keeping pots/roots warm, may help a lot! We've been experimenting with cold protection for a long time - for the above-ground plant parts. For sure keeping roots protected (even with a thick layer of mulch) will benefit tropical plants during winter. In case with container plants, this may help dramatically.
The guideline is, tropical plants slow down or stop their metabolism at 65F. As long as you can keep soil above that temperature - this should work great. Of course, the higher the better.
Optimum temperature for growing tropical plants in general - 70-85F. Above 90F, metabolism stops too, unless it's a heat tolerant, desert plant.

More information on winter cold protection of tropical plants and zone pushing:

Greenhouse in Virginia
Plumeria cold protection
Ghost Cold Protection
Seven rules of cold protection for tropicals
About Cold Protection
Cold protection - winter action for your plant collection
Tropical Treasures articles on zone pushing.

Date: 3 Dec 2019

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

Date: 23 Jan 2025

Discover 10 best fruit trees to grow
in Florida and Southern landscapes

10 best fruit trees to grow in Florida, collage

Q: We recently moved into our new home in Florida, and the property is a great size - 5 acres - but it currently has no trees, just a few palms. I'm looking to plant some productive fruit trees to start building our own Food Forest. What fruit trees would you recommend as a good starting point?

A: With five acres of space, you have a fantastic opportunity to create a fruitful garden that can provide for your family for many years to come. Below are our top recommendations for must-have, easy-to-grow fruit trees that thrive in Florida's climate, grow quickly, and start producing right away.

1. Mango Tree

Mango fruit

Mango trees (Mangifera indica) are a must-have for any Florida garden, embodying the essence of the Sunshine State with their delicious and nutritious fruit packed with vitamins and fiber. These fast-growing, low-maintenance trees thrive with minimal water and are heat-tolerant. Grafted varieties produce high-quality, fiberless fruit in just 2-3 years, while dwarf "condo" mangoes are perfect for smaller spaces or containers. While young trees need frost protection, mature trees handle cold better. Grafted mangoes offer rich taste that you won't find in commercially grown, fibrous varieties, ensuring a sweet and vibrant harvest from your own garden.

2. Avocado Tree

Avocado fruit

The Avocado tree (Persea americana) is an essential addition to any tropical or subtropical garden. Known for its health benefits and superfood status, it's a favorite fruit that's not only productive but also a beautiful ornamental tree. Some avocado varieties are more cold-tolerant than mango trees, with the ability to survive temperatures below 25F. While many enjoy growing avocado from seed, only grafted trees guarantee quality fruit and immediate production, as seedlings can take 7-8 years to bear fruit. To successfully grow avocado, ensure good drainage by planting on a raised mound (4-6 inches) and keep the soil consistently moist. There are also compact varieties like Wurtz and Fuerte that thrive in containers or small spaces, making them ideal for patios and small gardens.

3. Tropical Cherries

Eugenia Lolita cherry fruit

Tropical cherries, such as Cherry of the Rio Grande (Eugenia aggregata), Grumichama (Eugenia brazilensis), Pitomba (Eugenia luschnathiana), and Black Surinam Cherry (Eugenia uniflora var. Lolita), are popular and easy-to-grow fruit trees that offer fast growth and excellent fruit production. These compact, versatile trees thrive in both the ground and containers, starting to produce fruit almost immediately. Eugenias are low-maintenance, requiring minimal water, thriving in various soil types, and being pest-free. They are heat-tolerant and can endure cool winters, surviving light frosts. Birds love the fruit, but don't worry - there will always be plenty for everyone.

4. Barbados Cherry Tree

Malpighia Barbados cherry fruit on a branch

Barbados Cherry (Malpighia glabra), also known as Acerola, is a tropical cherry renowned for having the highest vitamin C content of any fruit. This nutrient-packed fruit is perfect for jellies, jams, and freezing without losing its vitamin C. The Barbados Cherry is a fast-growing, dense shrub that fruits multiple times a year, providing abundant harvests for gardeners seeking quick results. It thrives in alkaline soil, tolerates drought, and is relatively cold-hardy, withstanding light freezes. Birds love the fruit, making it a great addition to wildlife-friendly gardens. The dwarf variety, Nana, with its small leaves and fruit, is perfect for containers, borders, or even bonsai, adding ornamental value to any space.

5. Noni Tree

Morinda Noni fruit on a 
branch

The Noni Tree (Morinda citrifolia) is a top superfood plant that makes a fantastic addition to any Southern garden. Known for its numerous medicinal benefits, Noni fruit offers anti-inflammatory properties, relief from arthritis, and support for conditions like diabetes, metabolism, and weight loss. It's even believed to help fight cancer. Noni trees grow quickly and begin producing fruit within 2 years from seed. This tough, resilient plant thrives in poor soil, endures summer heat, and withstands drought conditions. Despite its tropical appearance, Noni is surprisingly cold-hardy, recovering well after leaf damage in cooler weather. In addition to its health benefits, the Noni tree has ornamental value, with large, waxy leaves and unique fruit, where the flower appears to grow directly on the fruit!

6. Macadamia Nut Tree

Macadamia nuts on a plate

The Macadamia Nut Tree (Macadamia integrifolia) is a fantastic addition to any garden, allowing you to grow these delicious, high price tag, nutrient-rich nuts right at home. These trees are cold-hardy, grow quickly, and thrive in all Florida soil types. Once established, they are productive and can tolerate both flooding and drought. Older trees can survive colder winters, while young trees need protection from temperatures below 25-26F. Macadamia trees like plenty of water and a special fertilizer program, including liquid fertilizers and microelements, to ensure healthy root development and optimal production. Aside from being rich in healthy fats, vitamins, and minerals, macadamia nuts offer numerous health benefits, such as improved digestion, heart health, weight management, and blood sugar control. They are also packed with tocotrienols - antioxidants which may protect against cancer and brain diseases.

7. Papaya Tree

Papaya fruit with seeds

Papaya trees (Carica papaya) are resilient, easy to grow, and produce fruit year-round. Rich in papain, a digestive enzyme, papayas are a superfood that promotes gut health. These fast-growing trees often begin producing fruit within the same year they're planted, providing quick rewards for gardeners. Many varieties, especially dwarf papayas, are space-efficient, reaching only 6-8 feet tall while still yielding large crops, making them perfect for small gardens. Surprisingly hardy for a tropical plant, papayas can withstand light freezes and strong winds (tested in hurricanes!). While they are self-fertile, planting 2-3 different cultivars improves pollination and increases yields. "Solo" cultivars, with their smaller, round or oval fruits, are sweet and less susceptible to fruit flies.

8. Guava Tree

Pink Guava fruit

Guava trees are beloved for their flavorful fruit, commonly used in juices, drinks, and desserts. Popular varieties include Tropical Guava (Psidium guajava), Cattley Guava (Psidium littorale), Cas Guava (Psidium friedrichsthalianum), and Pineapple Guava (Feijoa sellowiana). Despite their tropical nature, guavas are surprisingly cold-hardy, suitable for cooler climates and occasional frost. These trees thrive in moist conditions and can tolerate some flooding, while their compact growth makes them easy to maintain at any height or shape. Guavas are fast-fruiting, often producing fruit within a year of planting, and even some varieties in 1 gal containers. The dwarf Nana variety is perfect for container culture, producing full-sized fruit in a compact form. Guava trees are mostly pest-resistant, though mealybugs may require occasional treatment with neem oil in humid, rainy areas. Planting multiple guava trees ensures a continuous supply of fresh, juicy fruit and delicious guava juice for everyone to enjoy.

9. Jackfruit Tree

Jackfruit fruit at the base of the tree

The Jackfruit tree (Artocarpus heterophyllus) is a striking, fast-growing tree known for producing the largest fruit grown on a tree, making it a showstopper in any garden. Nutrient-packed and often used as a meat substitute in South Asian cuisine, Jackfruit is also delicious in curries, chutneys, and as dehydrated chips. These trees grow quickly, have large waxy leaves, and can be maintained at a compact height of 7-8 feet, making them ideal for smaller spaces and easier cold protection. Despite being a tropical species, Jackfruit trees are relatively cold-tolerant and can survive light frost (although on the account of production volume), with established trees being more hardy than seedlings. Jackfruit trees begin producing fruit within 3-4 years from seed, and varieties come true to seed, eliminating the need for grafting, though it can be done for specific varieties.

10. Loquat Tree

Loquat fruit on a branch

The Loquat tree (Eriobotrya japonica) is a fast-growing, drought-tolerant, and highly cold-hardy tropical fruit tree that thrives in Florida gardens. Loquats are heavy producers, with juicy, aromatic fruit that ripens from early spring to early summer, offering a delicious apricot-like flavor. This compact tree is perfect for small gardens, beginners, and those with limited space. Loquats are undemanding, thriving in any soil and withstanding summer heat, winter cold, heavy rains, and occasional flooding. Nutrient-rich, they are high in sugar, acids, vitamins B and C, minerals, and pectin. Loquats are versatile, enjoyed fresh or used in fruit salads, jams, jellies, chutneys, pies, sauces, and even wine-making, and they are often used as a natural sweetener.