Garden Blog - Top Tropicals

Date: 15 Aug 2021

How to grow Cerbera and make it flower

Q: I purchased Cerbera manghas - Enchanted Incense a year ago. As you see from the photo, it's doing great however, no blooms. I fertilize properly and very often and use worm castings for micronutrients. Yes it's not "your" fertilizer, but my plumerias, that are also in pots they are over 5 feet tall and blooming like crazy. I don't see any inflows coming on the Cerbera at all and it is hot and humid here in North Carolina, so it's happy but no sign of blooming. What is your advice?

A: Top Tropicals first brought Cerbera manghas into the US plant market a few years ago, it was recommended to us by our friend, plant taxonomist John Mood who visited Thailand, and among other exotic plants noted this fragrant beauty. Since then we've been successfully growing this plant, it has become one of everybody's favorites.

Generally speaking, Cerbera culture is very similar to Plumerias. These plants are closely related. So if you know how to grow Plumeria, you sure will succeed with Cerbera. Hot and sunny location, well-drained mix, moderate water and bloom boom fertilizer will do the trick. However, we have noticed a few distinctive features that make this plant somewhat challenging at times.

1) Flowers

For past years, we've been studying what triggers its flowering. Sometimes these plants start flowering in 1 gal pot, 1 ft tall. Other times a large developed tree 5-6 ft tall, in 5-7 gal pot, grows beautiful foliage with no signs of flowers. Eventually all of them bloom, no matter how stubborn they are, it's just some individual plants start flowering sooner than others, all grown in the same conditions.
One of our plants in the ground, a well-branched tree, was covered with flowers for a few months, but only on the 3d year after planting. Before that, it only produced a few random blooms. Others bloomed in pots at very young age.
The following factors benefit to Cerbera flowering:
- full sun at least 10 hours a day
- hot temperatures above 85F
- regular water but not heavy rains
- regular fertilizer - Bloom Booster type
- very good drainage and drying out before waterings. If root ball stays moist, the plant may look healthy but won't set flower buds. Keeping on a dry side will encourage flowering. Very similar to Jasmines: they bloom like crazy in April while it's hot and dry in Florida, but once our summer rainy season starts, they reduce blooming.

We highly recommend using Sunshine Megaflor bloom booster or SUNSHINE Pikake in combination with micro-element supplements Sunshine Honey (B-Mo) and Sunshine Superfood (complex micro) that induce flowering. Dry and granulated fertilizers may not supply exactly what a plant needs: certain elements that trigger flowering may be missing. Sunshine Boosters formulas are scientifically balanced, they contain precise amounts of nutrients needed for setting flowers. Besides, excessive salts from regular dry fertilizers create nutrient lock up that may retard plant metabolism; with liquid amino-acid based Sunshine boosters, plants consume the whole menu of elements without building them up in the soil.

2) Fruit

Fruit of Cerbera are very pretty and cover the tree after profuse flowering. To inexperienced eye they may look very much like small mango or avocado fruit - so make sure kids or visitors don't try to eat them! Cerbera seeds are extremely poisonous.

3) Leaves

If you ever grew Passiflora or Milkweed, you know how leaves can be eaten by caterpillars overnight. This may happen to Cerbera too, as we discovered. In Florida environment this exotic plant doesn't have natural predators for protection from certain insect species that may feed on it. So watch out and if noticed first signs of leaves damage - its time for insect control.
Other than that, Cerbera foliage is usually beautiful and colorful, here in Florida it looks much healthier than that of Plumerias often affected with rusty residue during high humidity months.

Hope this helps. The Cerbera fragrance is enchanting, it is worth the efforts and waiting!

Date: 30 Jun 2020

Plants like to snack!
How to feed Poinciana tree

(and other tropical flowering trees)

Q: We purchased a Royal Poinciana tree from TopTropicals not too long ago and we gradually gave it more sun until finally we were able to plant it in direct sunlight where it's been for a week or so. Rain has been sporadic lately so I'm giving it a little bit of water every day. It seems to be doing fine. I do have a question about whether the leaves are as green as they should be? I read online that I should fertilize it with gardenia / ixoria fertilizer in March, June, and October. I looked on homedepot.com but didn't really find anything that goes by that name. Would fertilizer help? Can you suggest a fertilizer?

A: Your Poinciana tree looks pretty healthy and happy, congratulations with a great job!
Traditional (old-school) fertilizer recommendations usually suggest feeding a plant 2-3 times a year with a slow-release fertilizer. And although a plant will benefit from any fertilizer application (extra food is always good), however, for the best results, faster growth, sooner and more profuse blooming, your should use complete plant nutrition products - liquid fertilizers (see why liquid fertilizers are better than dry).
Here is an example. Some people eat a big heavy meal once a day which we all know, is not very healthy. Other people eat balanced food more frequently but in smaller portions - this is always the best way to go.
From this point, plants prefer SNACKING - frequent feeding, but with less concentrated, mild and balanced nutrients.
For your beautiful Poinciana tree (and other flowering plants), we suggest the following nutrition program:

1) SUNSHINE Megaflor - Bloom Nutrition Booster - you may use this fertilizer as frequent as with every watering, it won't burn the roots, and will provide a complete nutrition for all plant needs throughout the year. You can continue fertilizing with Megaflor even during winter time. Sunshine Megaflor will help you to keep the plant healthy, vigorous, and resistant to stress and diseases. It turns leaves green and makes the plant strong so it will start flowering sooner for you.

2) Tropical Allure - Smart-Release Booster. Apply it once a month during hot season only (in Florida - from March to November).

Date: 27 Apr 2020

How to feed a Mango tree...
and to grow a Dwarf Mango

How to fertilize a Mango tree

Q: My mango trees that I bought and planted last august now have fruit. I bought 2 types of fertilizer from you and never used it. Should I use your fertilizer now?

A: It is a perfect time now to fertilize your plants as they start active growth. For mango trees, we recommend liquid fertilizer Sunshine Booster - Mango Tango. It is formulated for Mango trees, especially for container grown. It improves quantity and quality of flowers and ability to set fruit, reduces bud-flower-fruit drop. Can be used as often as with every watering. For best results, use in combination with Sunshine Honey and Sunshine Superfood plant supplements. Its scientifically-balanced stable formula is organic Amino-acid based and has NO EDTA chelators to eliminate nutrients lockup; it does not affect crop taste.
Additionally, you may use slow-release granulated fertilizer Mango-Food once a month during hot season only. Dosage: 1 teaspoon per each gal of soil. Water-soluble fertilizers can be also used, however, those are usually EDTA-chelated which is not as efficient as Amono-acid based Sunshine Boosters and may create nutrients build up, especially if overdosed in containers.
For in-ground mango trees, you may use all the above, and slow-release granulated fertilizer can be applied in larger quantities: spread a handful around the drip line.

Remember that only liquid Sunshine Boosters can be applied year around. With other fertilizers, you need to be careful not to overdose, and apply only during hot weather (when night temperatures are steadily above 65F).

How to grow a Dwarf Mango tree

Q: I received the Ice cream mango tree in great condition (thank you for the ingenious packing job) on Wednesday and have planted it in a pot slightly bigger than the root ball. I plan to grow the tree on my front porch, so how big a container should I ultimately use when the tree outgrows this pot? How big a container does it need to fruit? I hope to keep it around 6-7 feet high, if possible. I live in Hawaii.

A: Ice Cream mango is a perfect variety for container culture, and it should be happy in Hawaii. You did everything right. Keep it in this small pot for now and wait until it starts vigorous growth in Summer. Once it starts growing (and you will notice roots growing too, sometimes they try to grow through the holes in the bottom of the pot), then it's time to step up into a bigger container (7-10 gal). Eventually you may use container size as large as 15 gal. Ice cream mango is slow growing and compact, and you will be able to maintain it under 7 ft with very minimal pruning if any.

Date: 24 Jun 2018

Our honest advise on Holiday Gift Plants

Q: Any suggestions on gift plants? With Holidays around the corner, I've been thinking of getting a present for my grandma, she lives in FL and is an experienced gardener. I also have a friend that lives in CA, also warm climate, but she doesn't have a green thumb. Any "easy" plants I can try for her?

A: Live plant is a perfect gift, as we all know. However when ordering a plant online as a present, for a happy experience, you should have three things to consider:
1) Gardener's experience. Planting instructions are included with every order, and usually success is there if you follow them. But all plants go through shipping stress (some more, others less) and need time, patience and love to recover. Also, a plant will need a new home after shipping: a pot and a good soil mix. It would be wise if you add potting mix with a gift order; the plant should be planted in a permanent pot as soon as possible, but normally can wait a day in a packing bag until its new owner gets a pot, if it is not ready yet.
2) How easy the plant is? If buying a plant for a beginner, chose something easy, as well as showy. Adeniums - Desert Roses, Jasmines, Clerodendrums, Cordylines are always a good choice. Calatheas, Gingers and Heliconias are always showy, even when not in bloom. Spice trees and herbs are fun, easy to grow and one can enjoy their aroma right away without waiting on them growing bigger. Miracle Fruit is an awesome present, it comes with detailed instructions how to grow the Miracle!
3) How easy the plant ships? Some plants can be easy in cultivation, but they don't take shipping well. After being in a dark box for a few days, most plants usually recover well in experienced hands. When making a present, you want something showy, not just a stick to arrive. Besides Adeniums and Jasmines, many fruit trees usually take shipping without a problem - such as Mango or Sapote trees. You may not want to start with Avocado, Papaya, Carambola, or Cacao - unless they go to an experienced grower - these may take some time and skill to etanblish. Fig trees are super easy in shipping, but figs may drop leaves in Winter - for this same reason, you may think twice about deciduous plants like Sugar Apples, Grapes, Mulberries or Persimmons to be sent as gifts. On the other hand, if you are sending a deciduous tree to a gardener who can appreciate the variety, this may be a good choice - dormant plants take shipping with less stress!

Holiday special: On the picture: Adenium Xmas Santa. A Holiday Special Desert Rose with Christmas-colored flowers - deep-red and white.

Still not sure which plant to choose? You may buy a Top Tropicals Gift Certificate

Date: 10 Apr 2016

Growing by the sea

Q: Please recommend me some interesting plants that can grow on my waterfront property and can withstand some salt wind. All my neighbors have Sea Grape trees and bougainvilleas, and I want something different and special. I would love to have some colorful or fragrant flowers, or fruit around my paradise home.

Q: Considering your neighbors successfully grow Sea Grape (Coccoloba), and Bougainvilleas, you have a mild, frost free climate. There is a number of spectacular and useful tropical plants that are salt tolerant. Orchid Trees - Bauhinias, Poincettia - Delonix, and Geiger trees - Cordias, are very showy flowering trees. For large size bushes, try Dwarf Poincianas - Caesalpinias, and Scarlet-Coral Erythrinas. Frangipani - Plumeria, come in different colors and bring you perfume fragrance from Hawaii. And of course, Desert Roses - Adeniums, can be grown and showy specimens anywhere in your yard, both in the ground or as potted bonsai.

Most palms, especially popular Coconut Palm, source of tasty fruit and drink, are highly tolerant to salt breeze. If you are looking for something that nobody has, Lipstick palm, or Sealing wax palm - Cyrtostachys lakka, is definitely the most spectacular palm you can find. It is a stunning feather palm that develops a brilliantly red trunk. Palm is originally from Malaysia, but has been introduced to Costa Rica and other tropical areas of the world. Sealing Wax Palm seeds are very slow to germinate, up to a year, and large specimens are very rare and hard to find even in rare tropical plant nurseries. This palm will require a good overhead light, and constant warmth (above temperature 55F). It is definitely worth an effort to grow this beauty.

You may add more tropical accents to your landscape by the sea with many varieties of showy heliconias.

See full list of salt tolerant trees