Garden Blog - Top Tropicals
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Growing mango in hot Arizona
By Mike D, Mesa, AZ. Despite to what you may think, mango can be successfully grown in desert Arizona climate. It has good heat and drought tolerance. It's possible providing the following:
1) Winter protection of a young plant when temperature goes around or below freezing. Try to plant trees in locations where they're protected from cold wind. Minimal temperatures vary widely. Areas which are closer to downtown are few degrees warmer, while outskirts can be very cold.
2) Some people are lucky enough to live in areas with good soil. However, most of us will have a so-called hardpan (extremely compacted desert) or caliche (layers of soil cemented together by calcium carbonate). Check with your local county extension office to determine how to deal with such conditions. Gypsum is usually used to loosen compacted soil.
3) When planting, dig a large hole making sure it has good drainage. Plant tree as usual, add mulch around it. It helps to conserve moisture.
4) Best time to plant is late Fall or early Spring, so mango can get established before Summer heat.
5) Plant where tree gets few hours of sun.
5) Water a lot until established. Once established, water when soil is dry.
6) Small plant may need protection from summer heat. Use shade cloth.
7) Mango requires very little nitrogen fertilizer. In hot climate, overdosing nitrogen may result in quick plant decline. Use balanced low nitrogen slow release fertilizer or avoid nitrogen completely. If you use mulch, then decomposing mulch provides enough nitrogen. Foliar spray of micronutrient solution is recommended during active growing period. Read more...
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Q: I live in California and about a month ago ordered several plants from you, including fruit trees (Carambola, Mango, Avocado) and flowering trees (Xanthostemon, Adeniums, Champaca, Ylang Ylang). They were all doing well until I tried to move them into full sun, when they got leaf burn immediately. Ylang Ylang was doing great in a shade, but I repotted it from 1 gal into 3 gal and it is drooping leaves now. It has been very hot (over 100F) and dry (humidity is less than 25%). Any suggestions?
A: Hot summer can be pretty challenging time for establishing new plants. These are some guidelines to make your summer gardening more successful and rewarding.
1. You can order plants at any time, but keep your eye on your local weather forecast and try to chose cooler periods to schedule your plant shipments. Here at TopTropcals we monitor weather at destinations, and we can also delay shipment per your request until more favorable conditions.
2. During hot Summer months, many plants are still OK to ship, and to be planted, many species are heat tolerant. It's usually safe to ship most succulents, including Desert roses and Euphorbias. Some fruit trees are pretty easy too, like Loquats, Mango, Eugenias. Many flowering trees can take heat: Acacias, Clusias, Jatropha, Sausage Tree, Plumerias and many others. Check our full list of plants suitable for hot and dry conditions. Most jasmines, including Jasmine Sambac and Trachelospermum make also a safe choice for hot weather planting.
3. Use shade cloth or simply white sheets to protect young plants and new plantings from hot sun.
4. When establishing mail ordered plants during hot weather, keep them in shade for longer period of time than average recommended 1-2 weeks. Give them a chance to establish really well. In areas with low air humidity, try to create a simple mist system. It can be purchased in your local Home Depot for only $20 and set up takes only 10 minutes! It makes a big difference and can help you save many plants from hot weather stress.
5. Although it may seem that during hot weather plants need more water due to high evaporation, be careful with watering, and check soil with your finger before watering - don't water if it is still wet. Combination of "hot and wet" can be as harmful for the root system as "cold and wet" during winter. Protect root systems from overheating: covering black pots with white cloth will work. Remember when temperature is above 90F, most of plants slow down their metabolism, which means roots slow down or even stop pumping water and become more vulnerable to overwatering. For the same reason, do not hurry to step up into bigger container if roots haven't filled yet the existing pot.
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Q: I'm looking for a plant to replace a Torrey pine that was sadly cut down. The pine made the soil very acidic and it's already silty, sandy, and salty from being near a coastal marsh. I was thinking of a Kei Apple. However, there are only seeds available on the website and I'd prefer a sapling to get things started faster. Are there other trees you'd suggest for that environment?
A: Here are some fast growing salt tolerant trees that we can suggest, just to name a few: Bucida buceras - Florida Black Olive Tree, Callistemon citrinus - Weeping red Bottlebrush, Capparis cynophallophora - Jamaica Caper, Cassia fistula - Golden Shower Tree, Coccoloba uvifera - Sea Grape, Cordias, Delonix regia - Royal poinciana, Flamboyant, Elaeocarpus grandiflorus - Fairy Petticoats, Ficus lyrata - Fiddle-Leaf Ficus, Ficus religiosa - Bo-Tree, Peepal, Sacred Ficus, Mahoe, Peltophorum pterocarpum - Yellow Poinciana, Plumeria, Spathodea campanulata - African Tulip Tree (shown on right). See full list of salt tolerant plants.
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Seeds germination in summer
Q: What is the best way to germinate seeds in summer? Should I keep trays indoors or put them outside?
A: Summer is the best growing season for plants, and for their propagation. Seed germination process of tropical plants usually benefits from warm, and even hot temperatures, so keeping pots with seeds outside in full or partial sun can be the best way. However some seeds may be more sensitive than others, or require slightly cooler or higher temperature for germination. These are a few tips that may help:
- For seed germination, use only well drained mixes, containing either peat moss or coconut fiber to retain moisture. Some succulents may require adding sand to the germination mix. You may also try our Professional Formula Seed Germination Mix.
- Large tropical seeds, like palms, or seeds of Fabaceae (Bean) family, can be grown in full sun. Their germination will benefit from higher temperatures (up to 90-95F). Make sure to keep soil moist. Cover them well, with 3/4 to 1 inch of soil.
- Fruit seeds (large size) should be germinated either in individual cells or small pots (3-4" diameter).
- Small to medium size seeds can be grown in so-called community pots. Seedlings can be separated after they establish their first roots.
- Tiny seeds should be planted closer to the surface, covered with only 1/4-1/8 inch of soil; some seeds require bright light for germination, so full sun will be a plus. Some small seeds like Ficus for example, prefer to be broadcasted on the surface, uncovered. Put containers with such seeds in bright shade, as you don't want the surface of the soil to dry out.
- Once your seeds sprouted, move them in filtered light - bright to medium shade depending on tenderness of the species. (Gingers prefer shade, while succulent sprouts can stay in brighter light). Regardless of water/sun needs of the species, all young sprouts and first leaves are sensitive to hot sun and may get burned or even killed. Once a baby plant has a few leaves and well-branched root system, you may start moving trays into a brighter light.
- Do not overwater young seedlings, keep soil slightly moist but not soggy.
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Cancer Zodiac lucky plants
Cancer - 6/21-7/22. Cancer is a WATER sign and is ruled by the Moon. Cancer's plants generally have soft or Moon-shaped leaves, contain a lot of moisture, or are found near water. Oftentimes they have white, pale blue or pale yellow flowers. Cancer rules the stomach, diaphragm, and liver, so plants that aid digestion or affect the subconscious are associated with the sign of the Crab. Maternal Cancer also governs the breasts, the womb, and the ovaries. It rules all fluid secretions, including menstrual blood, fluids in the eye, and tears. The moon is often associated with conditions involving irregular periodicity: irregular menstruation and related moods, epilepsy, insomnia, hysteria. Lunar herbs tend to have white or yellow flowers and soft, juicy leaves. They often live in or near water. As they are so nurturing and warm, Cancer loves the homey smell of cinnamon. This sweet spice is good for gently heating things up; it also promotes movement and flow in life. Its familiar scent is soothing and calming for those who need a little retreat every now and again.
Cancer Zodiac lucky plants: Lilies, Eucomis, Magnolia, Nicotiana, Brugmansia, Dombeya, White flowers, Water lilies, Lotus, Maidenhair fern, Monstera, Cinnamon, Sage, Aloe, Lemon Balm, Bay leaf, Palasa - Butea monosperma, Acai, Mahogany, Mango, Banana, Apple, Pear, Geranium - Pelargonium, White roses, Solandra Chalice Vine, Butter Cup, Acalypha, Cornutia, Ruda, Oregano, Camphor plant, Grapes, Brunfelsia, Alocasia, Colocasia, Canna, Cyperus, Iris, Equisetum, Mangroves.
For other signs information, see full Plant Horoscope.
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Taurus - 4/20-5/20. Taurus is an EARTH sign ruled by the planet Venus.
Venus is the planet that represents desire and beauty, regarded as the female embodiment of sexual love and human appetite, so Taurus plants often have gorgeous flowers and enticing fragrances and, occasionally, red fruit. It rules the internal sexual organs, the nose and sense of smell.
Because Taurus rules the throat and ears, the best plants for the Bull are often soothing to the throat, or may calm the digestive system after overindulging in the finest foods. Taurus is related to those things we want and value. It harmonizes various body systems, and influences the complexion and facial appearance. Also under Venus's dominion are the abdomen, kidney, thymus, and breasts. Venus-governed herbs are soothing and help to regulate the body's metabolism through the endocrine system. Taurus herbs are traditionally used to attract money and resources. Earthy Taurus sign is all about building a stable and comfortable foundation and can help you generate greater abundance and prosperity in your life.
Taurus Zodiac lucky plants - Aglaia, Cananga odorata (Ylang-Ylang), Artabotrys (Climbing Ylang-Ylang), Cerbera, Night blooming jasmine, Chonemorpha, Erblichia, Euodia, Hiptage, Iboza (Musk Bush), Anise, Lavender, Lonchocarpus Lilac Tree, Nutmeg, Parijat, Camphor Basil, Osmanthus, Funeral tree, Quisqualis, Satureja (Kama Sutra Mint Tree), Viburnum, Carissa, Murraya, Curry Leaf, Bunchosia (Peanut butter fruit), Eucalyptus, Lily, Vitex agnus castus (Blue Chaste Tree), Alstonia scholaris (Sapthaparni), Papaya, Maple, Jasmine, Guaiacum, Camellia, Ephedra, Fuchsia, Geranium, Spider lily, Gardenia, Magnolia, Plumeria, Paeonia, Verbena, Clerodendrums, Apple, Pear, Apricot, Peach, Plantain, Olive, Grape, Pomegranate, Mango, Neem Tree, Cherry, Cypresses, all Berries, Raspberry, Asparagus, Mint, Clove, Roses, Stagshorn fern, Catnip.
For other signs information, see full Plant Horoscope.
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How to get Clerodendrum to bloom?
Q: My Clerodendrum thomsoniae is not blooming. Actually it is not doing much of anything except putting out weak growth and small leaves. I purchased this plant May 26. 2015. Over the winter it was in a heated sunroom, at night 60 degrees, where it received some direct sun from the skylights. I reduced the water to prevent excessive leggy growth. I don't see how this plant can take full sun or even part sun. Temps here in Raleigh NC are 80-85 degrees and 65-70 at night, at the moment. I figured I would gradually expose it to more direct sun after being in a sunroom but the leaves burn. I had this plant in San Jose many years ago where it did quite well, blooming with no special treatment. So thought I'd give it a try again. Any advice?
A: Clerodendrums are all time favorites, appreciated by both gardeners and house plant collectors, for their showy, fragrant flowers and very easy culture. When growing Bleeding Heart (Clerodendrum thomsoniae), a few things should be taken in consideration:
1) Temperature.Like most clerodendrums, this plant is semi-decidious outside of tropics and goes dormant in winter. It may lose some or all leaves if temperatures drop below 60-65F. It is not too cold sensitive, the plant can even take some light freeze. However when it is not hot and humid, it slows down metabolism. This means, water should be reduced during cooler months.
2) Light. This plant can grow in both sun and shade like most clerodendrums - this is the beauty of this genus. However like with all flowering plants, more sun promotes more bloom. In shade, it will grow beautiful dark green foliage (leaves will be bigger than in the sun) on the account of flowering; in full sun leaves turn lighter color and sometimes may even get unattractive "faded" look, but flowering will be profuse. Also remember that Arizona full sun is different than New York full sun. Here in Florida, Bleeding Heart can take some full sun, but if exposed to sun all day long, leaves often get sun burn.
3) Acclimation. Also called acclimatization - this is a process when a living organism adjusts to environment changes. Acclimation is always the case when growing plants indoors, even in a sun room. When Spring comes, and especially when we start taking outdoors those plants that have spent a few months indoors, light level increases dramatically, and this may cause leaf loss, and leaf burn. It is not necessarily a bad thing, it is just a mechanism of acclimation. Example: imagine yourself after living in a warm tropical climate, moving to a cold country. For a while your body will feel discomfort from "too much cold", while native residents may feel comfortable. We call it "My blood has thinned after living in Florida" - and this is a physiological fact. And vice versa, if you are a Northerner, moving to hot climate may be a challenge; it will take a while until you get used to hot and humid tropical summers. Same thing with plants: during cooler and darker period, their body (leaves and stems) becomes "winter type", with some serious chemical restructuring. Immediate environment change, like bright light and high temperature, causes a shock to those "winter cells", and as a defense mechanism, the plant gets rid of those useless "winter" leaves, replacing them with new "summer" leaves with completely new chemistry and metabolism.
From what you described, you know your plants, and you know what you are doing. You did everything right by reducing watering in winter and gradually moving the plant into brighter light. You still may see some stress, and this is normal. If you patiently keep changing environment slowly, eventually your plant will generate new healthy "summer" growth, it will also improve more vigorous root grown which will help the plant to establish better and to be stronger. You will see larger, thicker leaves, and definitely some flowers.
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Top Tropicals Video: Ambarella - delicious June Plum
Golden Apple, or June Plum - Spondias cytherea.
This exciting fruiting plant will amaze you with its ability to flower and fruit at a young age. It fruits in winter and holds the fruit up to 6-8 months, long after the leaves have dropped. The fruit appears in pairs and will turn a brushed-golden color as it ripens. Its feel and juiciness resembles that of a mango but with completely different flavor. The Golden apple is used both in sweet and savory dishes depending on its ripeness. When green, the fruit is commonly eaten as is (with or without skin just like green mangoes) with salt and other salty/spicy dips, made into salsas, chutneys, and into juices and smoothies. When fully ripe, the Golden Apple will be deep yellowish-orange in color. When yellow, the fruit is eaten just like an apple or stewed with sugar to make an applesauce-like dessert.
Check out this video: Ambarella - delicious June Plum...
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Jungle on Windowsill 101
Q: I got a Jasmine Sambac and a Tahitian gardenia as presents, they are very cute plants with flowers and flower buds. I would like to be able to keep them alive and hopefully happy for a long time, but I don't know much about growing tropical plants, and I am not sure if my thumb is green enough to make everything right. What do they need? How much sun? How much water? What kind of soil? Sorry for all these (maybe silly) questions, but I want to keep them alive, please help! I live in Wisconsin and we had some snow again last week.
A: Growing tropicals is not a hard work, it is a lot of fun! These plants are actually a good starters for a beginner who wants to try growing tropical plants, no matter if you live in a mild frost-free climate, or up North where you can have these beauties as houseplants. Below are a few simple steps for you:
1. Read. Follow planting instructions included with your plants. Check plant names on the tags and learn more about them from our online catalog.
2. Soil. Plant in quality potting mix - it must be porous and well-drained, never use heavy soils (top soil or garden soil are no-no), in a pot exactly the size of the root system. You can step up your plants in the next size container once you notice vigorous new growth. Next size means: 4" pot can go into 6" pot, 6" pot into 10" pot, etc. Too big of a pot may create rotting environment, root system must fill the entire container to use all the moisture from the soil. Container must have good hole(s) for excess water to drain through. Put the pot in a saucer and get rid of excess water every time after watering.
3. Light. Most tropical plants require lots of light in order to produce flowers. If you ever visited Florida, remember the bright sun? - these are ideal light conditions for tropicals. Up North, provide as much light as possible: a bright spot on a windowsill of Southern or Western exposure would work the best. If the sun gets too hot in summer afternoon, you may shade the window a little bit with a sheet of white paper to avoid leaf burn.
4. Water. Keep soil slightly moist but not soggy. The best way is to wait until the top of the soil feels dry to touch - this is time to water again. Jasmines prefer to stay on a dry side; gardenias do not like soil to dry out - keep them slightly moist as long as soil is very porous and well-drained.
The main reason of most problems with potted indoor plants is over watering. With experience, you will feel the right balance of moisture in the soil: the brighter the light, the more water is consumed by a plant; the less light, the less frequent you should water.
5. Trimming. In low light conditions, plants tend to become leggy. Trim branches as they become too long: the more you trim, the busier the plant gets. New growth promotes more profuse blooming in many species.
6. Fertilizing. Fertilize indoor plants with slow-release granulated fertilizer from march to November.
7. Insects. Check for insects at least once a month, especially underneath the leaf. If notice any problems (deformed leaves, residue, holes, or tiny insects) - clean the leaves/stems with a solution of warm water (1 cup), vegetable oil (2 table spoons), and a few drops of a dish soap.
8. Fresh air and air humidity. As soon as air temperature gets above 65F, bring your tropicals outside in the sun and fresh air: porch, balcony, outside in the yard. Air circulation is essential for your plant health. Bright light and high air humidity will promote vigorous growth, and lots of flowers for you to enjoy!
For more information on growing Tropical Plants 101, see Problem solving with potted plants - how can we help them?.
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Growing gardenias indoors
From Brian B, WI: Just wanted to share this photo of one of the plants my parents got from you 3 months ago.
Q: Gardenia taitensis is my favorite gardenia. I would need to keep it indoors under a grow light. Is it worth trying to grow indoors or is really difficult? If so, can you recommend and indoor plant that has big fragrance and blooms often?
A: When growing gardenias indoors, four most important factors must be taken in consideration:
1. Bright light (Southern window and/or proper lighting set up)
2. Proper watering (gardenias love water, but roots are very sensitive to excessive water)
3. Rich organic soil with perfect drainage characteristics, regular feeding with high phosphate component and micro-elements containing Iron or Ferovit.
4. Insect control (inspect underneath leaves regularly and apply systemic or on-contact treatments as needed). See Top Tropicals video on easy insect control.
We definitely recommend Gardenia taitensis (both single and double flower varieties) for indoor culture. Another species, Gardenia vietnamensis, is even easier in cultivation as it takes wide range of conditions and may tolerate slight overwatering (unlike other varieties which are more sensitive). These three mentioned gardenias are somewhat tolerant to low light conditions. Under a proper care, they will grow successfully even in bright shade, however for blooming they require as much light as you can provide. Properly adjusted growing light may be helpful. You may refer to our article about indoor plant lighting in our magazine Tropical Treasures, Issue # 15, or website page.