The Flower of Gold

By Onika Amell, tropical plant specialist

Q: I am concentrating on adding more fragrance to my garden. I've had great success growing gardenias and I have many different varieties, but their flowers are all white, and I would like to add some colors to my garden too. Are there any gardenias available in different colors? I live in Waipio Acres, Hawaii.

A: Meet the very rare and highly fragrant, tropical Gardenia tubifera Kula or Golden gardenia. Kula flowers change color as they mature, which is a unique feature! Kula flowers start out as cream, then change to yellow and finally to a beautiful gold. In addition to the spectacular flowers, this gardenia also has beautiful, leathery, deep green foliage.
This is a slow-growing and compact plant. Like all the other members in the Gardenia family, the Golden gardenia will do best in an acidic, well-drained, and fertile soil. It will appreciate a good deal of direct sunlight but will be very happy if provided with midday and afternoon shade. As with with gardenias, the more sunlight the more flowers.
It will eventually grow into a rounded shrub if left unpruned, but also can be trained into a small tree, maintainable to a height of under 7-8 feet. Blooms will appear from spring onward. Prune after flowering, this will encourage more flowers in a few months.
Gardeners living in colder areas, do not fret. Gardenias make perfect container plants and can be grown indoors in colder climates. Just be sure to provide high light when bringing them indoors.
The fragrance and changing colors of a Gardenia Kula is unforgettable. They are most fragrant near sunset and during early evening hours. Plant them near walks and patios where their lovely fragrance can be enjoyed.
This rare tropical Gardenia is sure to be a conversation piece in any garden. Great collector's plant!

Recommended fertilizers:
Pink N Good Daily Plant Food - Flower Booster
Tropical Allure - Smart-Release Booster

Limited time special offer:
Instant $5 OFF Golden Gardenia!

How to get Strophanthus tree to bloom?

Q: I purchased from you three of these plants - Strophanthus bovinii and I wonder if you could help me. The plants are out of control growing large limbs to the sides and I would like it to grow more upright. Is this possible? Second, it does not flower. What type of fertilizer should I use and how often? How about the watering schedule? I have them in an eastern exposure but possibly they are not getting enough sun? Right in front of them, there is a large tree outside the curb of my house. What should I do about that?

A: Strophanthus bovinii - Wood shaving flower, is quite a unique plant that is very rare in cultivation, this is why very little information is available on its cultivation due to limited experience among gardeners. We have had this plant in our garden for over 12 years and this is what we can advise.
In the nature (Madagascar) it supposedly grows into a large tree, however, from our experience, it tends to be rather bushy, umbrella-like large shrub. Yes, you can train it into a tree by trimming branches growing side-wise, and by removing lower branches. The best time for pruning is early spring when the tree starts new growth and re-leafs (it is semi-deciduous). As far as flowering, the plant is very particular about blooming season, with profuse flowering in Summer (here in SW Florida), however it may produce more flowers sporadically throughout the year.
It thrives in full sun but will tolerate bright filtered light. If a large tree is shading it too much, try to trim some limbs of that large tree to allow more light. Water needs of Strophanthus bovinii are very moderate, so you can rely on your sprinkler system or water once a week for established plants.
You should use 2 types of fertilizers - slow release (once a month) and water-soluble bloom booster (frequent applications are safe):
Pink N Good Daily Plant Food - Flower Booster
Tropical Allure - Smart-Release Booster

Plants for South Texas and other hot states

Q: Pretty much adore last newsletter. Haven't been buying because our weather here in deep south Texas is so bad it is stunting and killing even the Tamaulipan Scrub! Do you have a cure for that? :) I have every expectation the new grafted Plumeria I purchased from you last year will bloom soon. One of my favorite plants. Thanks again and keep up the good works.

A: Yes, there is a "cure" - using biostimulants that improve drought- and heat- resistance (SUNSHINE boosters), plus the right plant selection. In fact, there is a large number of tropical rare plants that can be successfully grown in hot climates like yours. One of our partners lives in hot and dry Arizona area and has an amazing tropical garden that includes many fruit trees (Mango, Persimmons, Pomegranates, Loquats, etc). Here you can see a few pics from his garden.
Your choice is absolutely right about plumerias. Other easy plants would be Desert roses - Adeniums, and Fancy Euphorbia millii - all these come in so many varieties of colors and bloom throughout most of the year. Our special recommendations for you would be also:

Bougainvillea Dwarf Pixie
Jasmine sambac
Calliandra selloi Pink Lilian
Dracaena marginata Tricolor - Colorama, Money Tree
Hamelia patens Lime Sizzler - Variegated Fire Bush
Jatropha berlandieri - Buddah Belly
Pedilanthus tithymaloides - Devils Backbone
Trachelospermum asiaticum Mandaianum - Dwarf Confederate Jasmine

See full list of more plants that are suitable for hot and dry landscapes.

Apply fertilizers, miscroelements, and plant stimulants for improving heat tolerance

Heavenly Angel's Trumpet

By Onika Amell, tropical flower specialist

Q: Can you please tell me which zones are the best for growing Angel Trumpets? When do they bloom and is there a specific fertilizer to use on them? Do you sell any variegated varieties?

A: If you are lucky enough to live in an area that doesn’t freeze or only has light frosts, you can grow Brugmansia (common name Angel Trumpet) outside all year long. They are only entirely hardy in USDA zones 9-12, but they remain very popular throughout the United States. They do really well in coastal settings in the Southwest. They are simply glorious in the coastal areas of South California. In the southwestern states, as well as in the tropics, they bloom spectacularly throughout the spring, summer, and autumn.

Angel Trumpets are very heavy feeders and they need huge amounts of nitrogen. You can use a standard balanced slow-release fertilizer on Brugmansia, but then you must apply it very generously. We've created a specialized fertilizer just for them. Angel Trumpet Delight is a perfect Brugmansia food for frequent monthly feed. It's a 30-day Smart-Release formula that works wonders for Angel Trumpets. A a well-balanced combination of macro- and micro- nutrients with a slow release action, it provides continuous feed, maintains vigor and disease resistance. It also contains coated nitrogen, early release nutrients and extra iron (water soluble and chelated) for quick green-up.

Angel Trumpets come in a dazzling array of colors: orange, yellow, green, white, pink, red, emerald and even purple (closely related Datura). One of our favorites is the beautiful Variegated Orange Angel Trumpet, a new hybrid with variegated leaves and a large single bloom that starts white and turns orange. Another amazing variety is "Sun Explosion" - with a variegated orange flower.

Most folks are usually in awe of the enormous trumpet flowers when they see it for the very first time. They most definitely need to be planted where they can be admired… near a deck, terrace, lanai or, entryway. The blossoms are short-lived, but numerous, continuous, and truly show-stopping! And they smell so good! This is a must have in any tropical garden. They can be grown either as a bush or a small tree. They are easy peasy to grow and root extremely easily, making them great as pass-along gifts for friends. They are sun-loving and super fast-growing plants. Plenty of water and fertilizers keep them happy and at their best. Did I mention they smell good too? ;)

Synergy of SUNSHINE, biostimulants, and macro-micro

Q: I've heard that plants grow better and bigger with SUNSHINE boosters and when using Myco-Mix instead of regular soil mix. Do they work like fertilizers? If I use a Myco-mix, do I still need a fertilizer?

A: SUNSHINE boosters are not fertilizers, they are natural plant hormones, or biostimulants, as well as Myco-Mix which is a naturally occurring compound or microbes. Biostimulants are becoming increasingly attractive to folks interested in sustainable agriculture, and very popular for plant growth or pest resistance. A plant biostimulant is not a fertilizer because it provides no nutritional value to the plants. But, it can promote greater nutrient and water use efficiency, increase resistance to pests and diseases, reduce abiotic stresses, and in turn, lead to plant growth and health.

To answer your question, you can not replace regular fertilizers (NPK) and micro-elements with plant boosters and stimulants. However, fertilizers and microelements will work more efficiently when used in combination with biostimulants. Together they create a synergy, so plants use the most of fertilizer's potential, and will grow a lot better, faster, and healthier.

4 components for the best growing results

1. SUNSHINE boosters. They are a must during the juvenile stage of plant development - seedlings and cuttings. They are especially important for recovery of weak or stressed plants (boosting their immune system).
2. SuperFood microelements
3. NPK fertilizers. Select from water-soluble and smart-release types and make sure do not exceed the recommended concentration. Lower dose and more frequent use is always better for a plant.
4. Specialized soilless mixes: Myco-Mix (with biostimulant Mycorrhiza) for exclusive growing projects and special/unique plants, Professional potting mix for potted plants, and Propagation mix for seeds and cuttings.

Colors of Cannas

By Onika Amell, tropical flower specialist

Q: I’m a beginner gardener and looking for something easy to grow that will add a lot of color to my garden fast.

A: Try growing Canna lilies. They are a favorite of many gardeners as they are so easy to grow and always provide a reliable, beautiful show of flowers. In fact, Cannas are one of those plants that are spectacular even if they never bloomed. The leaves are tropical-looking, banana-like and huge! They range in a wide variety of shades and colors, always accentuating the large showy flowers on top.
One of our favorite cannas right now is Canna Cleopatra - very striking and most unique. Large yellow flowers speckled with red spots, or red flowers and even flowers with a little bit of both. Foliage is exotic and very beautiful, often dark green, dark chocolate or a combination of both. This is a canna that will definitely illuminate your garden!

Caring for Cannas

Cannas like a lot of water, full sun and high heat. They are also heavy feeders and prefer soils that are well drained, organically rich and moist. The leaves will quickly tell you when the plant is hungry. Feed your cannas weekly with a water-soluble 20-20-20 fertilizer Broad Leaf Plus, and they will quickly respond with beautiful, lush growth. Deadhead often to encourage continued flowering. Cannas are winter hardy in US hardiness zones 7 and warmer. If you live in colder areas, the rhizomes need to be lifted in the fall, and stored indoors in a dark, warm spot until spring arrives. Be sure to divide clumps every three or four years. Give them lots of room as they grow into large plants, forming spreading colonies up to 7 feet high and 4 feet wide. Show them off in mass plantings, in large containers or in mixed flower borders. Lure in hummingbirds with these beauties!

Grafted Guanabana - what is the trick?

Q:Should I buy grafted Guanabana or a seedling? It is a big price difference. I have heard that Annonas fruit within 3 years from seed, why do I need a grafted tree?

A: Annona muricata - Guanabana, or Soursop - is known as the best tasting Annona fruit. Many fruit lovers and gardeners want to have this tree in their plant collection, and the first question they always ask is: "How soon will it fruit? I can't wait to enjoy its deliciousness!"
Most Annonas start flowering and fruiting at a young age, 3-4 years from seed. Annona muricata seedling takes longer. You may read more information on how to grow Guanabanas from seed, even in a pot, even indoors - in Tropical Treasures Magazine issue # 7. Although it may take up to 15 years to see the fruit...
Now we have a solution to get this fruit sooner - a grafted tree! It will fruit within a year after planting. The secret of grafting Guanabana was almost lost (it's a tricky one to graft) and grafted plants were nearly impossible to find. Now we have them! Quantities are limited.
Keep in mind that Guanabana is very cold sensitive and won't tolerate even light freeze. However it is still relatively easy to grow even in subtropical areas: the tree is small, and if tree grown in ground, a simple cold protection structure can be built around it using basic wood or pipes (metal or PVC) and covered with plastic for a few weeks of cold weather. Grafted Guanabana is also a perfect choice for container culture (hand-pollinating maybe required).

Photo: This grafted tree was planted less than a year ago, and was covered in winter with cold protection for about 8 weeks. Within a year, it has 4 large fruit on it!

How to get gingers to bloom

Q: I have several gingers in my yard, including Red Torch, Lobster Claw, and Red Bamboo Ginger, they grow beautifully but only produce large dark green leaves and no flowers. Is there anything I can do to make them bloom? Do they need any special fertilizer?

A: Gingers are easy to grow tropical plants with so many benefits, giving us unique spice, and showy flowers (including long-lasting cut flowers!) - where other plants fail, especially in deep shade. They are not fussy about soils and even water once established. To keep your gingers happy, follow these simple steps:

1. Bright light is essential for flowering, but planting gingers in semi-shade or filtered light will keep them stress-free from burning summer rays.
2. Water gingers regularly until they established and start producing new leaves and stems. Once they start clumping, you may reduce watering to a minimum 9once a week or so), or rely on your sprinkler system.
3. Once the plant is established, start using fertilizer to induce flowering and healthy growth.
- We recommend granulated "smart release" fertilizer for all tropical plants. For gingers, the best formula is Tropical Allure. It provides all macro- and microelements essential for the healthy growth of the plant.
- Apply balanced water-soluble plant food for Gingers, Heliconias and Bananas - Broad Leaf Plus - once a month.
- Additionally, you may also add to the menu flower booster Pink N Good Daly Plant Food - this fertilizer is used in very low concentration and can be used with every watering.
4. Remove old dry and yellowing leaves with sharp cutters to avoid pest problems and keep good air circulation around these clumping plants.
5. Keep soil covered with 1" mulch to protect from weeds and maintain the optimal amount of moisture for the rhizomes.

Check out our specialized fertilizers for different plants - for all your gardening needs!

How to make the whole garden fragrant.
List of the most fragrant yet easy to grow plants

Q: Dear toptropicals, thanks for the great database on tropicals plants! I really enjoy browsing your web site and I am planning on completing my collection by purchasing some plants from your shop. I am particularly looking for fragrant plants that make the whole area fragrant. Can you provide a list of recommended fragrant plants that bloom throughout the year round? I currently have: murraya, plumeria, michelia alba, figo, champaca, rangoon creeper, honeysuckle, jasmine, stephanotis, Arabian sambac, brunfelsias.

A: As a must-have additions to your impressive fragrant plant collection, we can recommend the following rare fragrant plants below. These are our favorites that are easy to grow and free-flowering. Since they flower at different times, they will add fragrance to your garden throughout the year.
Aglaia odorata - Chinese Perfume Plant
Aloysia virgata - Almond Bush
Beaumontia grandiflora - Easter Lily Vine
Brugmansia Variegated Orange Angel Trumpet
Brunfelsia magnifica floribunda Jims Giant (very fragrant and very compact!)
Cananga fruticosa - Dwarf Ylang-Ylang
Cerbera x manghas hybrid - Enchanted Incense
Cestrum nocturnum - Night blooming jasmine
Crinum Queen Emma - Spider lily
Eucharis grandiflora - Amazon Lily
Euodia hortensis - Scented Evodia, Golden False Aralia (very fragrant leaves!)
Hedychium coronarium - Butterfly Ginger
Hiptage benghalensis - Helicopter Flower
Jasminum dichotomum - Rose Bud Jasmine - very fragrant!
Magnolia virginiana - Sweet Bay
Millettia reticulata - Evergreen Wisteria
Mirabilis jalapa - Four oclock plant - super fragrant!
Osmanthus x fortunei - Fortunes Tea Olive
Oxyceros horridus- one of the most intense perfume fragrances!
Radermachera Kunming - Dwarf Tree Jasmine
Satureja Viminea - Kama Sutra Mint Tree - strong mint fragrance
Sclerochiton harveyanus - Blue Lips, Mazabuka - lavender fragrance
Solandra maxima - Variegated Butter Cup
Telosoma cordata - Pakalana vine
Wrightia religiosa - Sacred Buddhist
You may consider many varieties of gardenias, and the most rewarding are:
Gardenia vietnamensis - Vietnamese Gardenia
Gardenia Aimee Yoshioka (First Love)
Gardenia posoqueria - Shooting Star Gardenia
Gardenia taitensis Heaven Scent (double flower)
Gardenia taitensis Tiare Tahiti, single flower
Gardenia tubifera Kula - Golden Gardenia
To see the full list of fragrant flowers, follow this link.

The most desired iconic Chanel flower...

By Onika Amell, tropical flower specialist

Q: I live in Beverly Hills, Los Angeles. I'm looking for something fragrant to grow on my porch. I don't have a lot of space and am interested to find something unusual that won't grow too large. Any suggestions? I've heard about Chanel #5 tree and I wonder I can keep it in a pot?

A: The Ylang-Ylang tree, Cananga odorata, emits a fragrance so soft and beautiful it became an essential ingredient of Coco Chanel's iconic and much-loved perfume Chanel No 5. Trouble is, it will grow into a giant. How do you get this kind of magic onto your lanai or porch? Opt for its smaller relative: Dwarf Ylang Ylang, Cananga fruticosa (pronounced ee-lang ee-lang, meaning: flowers of flowers).

The fragrance is a little less intense than its larger cousin, but still wonderful to have around. Let the fragrance drift slowly through the air into your home at night. The scent is strongest from dusk to dawn and it will need warm and humid conditions for a fuller aroma.
Dwarf Ylang-Ylang is ideal for folks with limited space as it can be grown in a container or as a house plant. It's a very unusual and interesting plant to add to your porch, lanai or garden. It's pretty easy to grow and disease resistant too. It will stay compact and in nice tree-like shape. Dwarf Ylang Ylang starts blooming quite young and will continue to bloom year-round with profuse blooming during the spring and summer months.
The tree prefers a high-humidity environment, evenly moist soil, warm temperatures and will grow best in plant hardiness zones 10-11 but can take short periods of cold.
Read more about Chanel No5 Flower...

Dwarf Ylang Ylang is certainly one of the most desired and sought after rare, fragrant plants. Get yours today!