Garden Blog - Top Tropicals

Date: 19 Jul 2020

Sugar grains on leaves?

by Mark Hooten, the Garden Doc

Q: On my Stemmadenia tree I noticed tiny drops (like white sand grain or sugar crystals) and wonder if this is a disease or some kind of insect and what can I do about it?

A: Sometimes certain vigorously growing (mostly tropical) plants develop suspiciously-looking tiny "growths" mostly on the undersides of their leaves. Without strong magnification, they can be easily mistaken for mealy bugs, scale insects, or any number of parasitic disease vectors.
However, according to plant pathologists, these are actually harmless excretions actually exuded by the plants themselves. A chemical analysis of these tiny granules shows that they are nothing more than polysaccharides. Polysaccharides are basically complex chains of sugar/glucose molecules which are simply a production of all plants undergoing photosynthesis. Polysaccharides are at the beginning of the entire food-chain. These odd tiny sugar-grained nodules are actually only semi-crystalline complex sugars which certain plants have over manufactured and have had no choice but to excrete through their stomata (breathing pores).
I have personally observed Cecropia, Psychotria, Spondias (Hog Plum), and Guavas doing this... there are many others. Nothing to worry about, they are harmless, but if they bother you - wash them off with a hose water.

Date: 2 May 2020

Which fertilizer is right?

Q: I need some advice on which fertilizer(s) would be perfect for my C​annonball tree and its cousin Heaven's Lotus (Gustavia augusta). ​I also have fruit trees... soursops, mango, etc. and a collection of flowers including pua keni keni, plumeria, bougainvillea, etc. I am wondering if you can recommend a custom fertilizing regimen for my garden (especially the cannonball and the gustavia since they are young).

A: It is a perfect time now to fertilize your plants as they start active growth. We have suggestions on fertilizing programs for your trees. You will find here our recommendations for:

1. Young trees
2. Flowering trees
3. Fragrant plants
4. In-ground grown fruit trees... CONTINUE READING >>

Date: 2 Jan 2020

The most fragrant flowers

Q: Hope you can help me with the following question with an upcoming newsletter. Would you please let us know of the strongest (pleasant) fragrant plants you currently have in stock? Fragrance that fills the space.

A: The most fragrant flower that "fills the air around" in definitely Chanel #5 - Cananga odorata a.k.a. Ylang Ylang. Just one tree when in bloom can fill the air with fine perfume for yards away.
Another strongly scented perfume tree is Joy Perfume - Magnolia champaca (both orange and white flowers are sweetly fragrant).
If you are looking for a smaller size plant, then the most fragrant are -
- Jasmine sambac
- Night-fragrant white-flowered Brunfelsias - B. americana, B. nitida, B. Gigantea, B. lactea and others.
- Night blooming Jasmine - Cestrum nocturnum is another favorite shrub with night-fragrant flowers, the scent is super strong and super sweet.
- Artabotrys hexapetalus - Ylang Ylang vine with wonderful lemony fragrance that fills the air.

See Full list of fragrant plants.

Date: 16 Nov 2019

When to apply super boost?

Sunshine Boosters: a breakthrough in Winter fertilizing

In the photo: plants are tough survivors. Life can't be stopped even by a brick road!

Q: Just wanted to know best time of day to apply super boost as spray and watering? Only listed to make sure night temp doesn't drop below 65F...

A: As a rule of thumb, plant's needs in fertilizers are very low in the cold season because they consume less nutrients during dormancy. For tropical plants, when minimum temperatures drop below 65F - we stop applications of dry (granulated) fertilizers until spring, to avoid root burn.
Liquid Sunshine Boosters are exceptions from this rule to a certain extent, for 2 reasons:
- they are amino-acid based which means, salts do not build up in the soil, and thus will not burn the roots even with slower plant metabolism.
- concentrations/formulas are mild and designed for as frequent as daily watering

Tips for winter fertilizing:

1) When a plant goes into full dormancy (drops leaves and does not show any new growth), you may stop fertilizing with any Macro NPK products (both dry and liquid)

2) If a plant is evergreen and continues growing during the cooler period, and especially if it is a winter bloomer, mild liquid fertilizers can be applied, depending on the stage of plant development.
Robusta and TotalFeed are used for vegetative growth and pre-flower.
Megaflor and C-Cibus are used for winter flowering/ fruiting plants during the bloom stage.

See full list of liquid boosters

3) Micro-elements can be used all year round for all plants that are not dormant (do not drop leaves)

4) Always use Sunshine-Epi as a foliar spray to activate immune system and unlock protective mechanisms, BEFORE applying other boosters. It is especially important during Fall-Winter for improving cold tolerance and disease resistance.

5) Always apply foliar spray and/or drench the soil with solutions in morning hours so the plant has time to process the nutrients during daylight when metabolism is the most active.

6) Avoid any dry fertilizers during winter

Date: 11 Oct 2019

Fun of growing your own Pepper

By Onika Amell, tropical plant specialist

Q: Can you grow your own black pepper plants in the USA?

A: Who does not love the smell of freshly ground pepper, especially that lovely combination of white, green, black and red peppercorns, which are so much more interesting than just plain black corns. Yes, you can absolutely grow your own pepper! Peppercorns come from the plant Piper nigrum.

Growing Pepper Plant

Black pepper plants are actually vigorous vines, although they are pretty slow growing and can be kept in a pot as a compact plant. But they will need a strong support to climb over. Indoors, you can provide this support by installing a trellis in a large pot. Some gardeners prefer to grow them as a hanging plant instead. In warm climates, you can plant them directly outdoors in a protected location with partial shade. These plants need rich, moist, well-draining soil and warm, humid conditions. Peppers do not like temperatures below sixty degrees, although they can survive some cold spells. It is very important to bring these plants indoors or wrap them in a blanket if colder weather arrives.
If you live in colder parts of the country, you can certainly grow peppercorns in large pots. Grow them outdoors during the summer and move them indoors during the winter, or grow them year-round in your greenhouse. Houseplants will need bright light and consistent moisture. Spray the leaves regularly with a bottle of water to increase humidity. Do not allow room temperatures to fall below sixty degrees.
Besides the benefit of being able to grow your own gourmet pepper corns, the foliage, as well as the flowers on this plant, are beautiful in its own right. Off-white flowers appear from spring through summer, followed by slow fruit production. The berries will appear on spikes, with 50 to 60 berries per spike.

Fertilize this vine in the spring before new vigorous growth emerges. We recommend:
Tropical Greenhouse Plus - Plant Booster
Tropical Allure - Smart-Release Booster

You may be surprised to learn that black, white, green and red peppercorns are all the same seed on the same plant in the various stages of development and processing.

Black peppercorns are the most familiar and come from the corns that have reached their full size but are still green and not quite ripe. They are picked and allowed to dry in the sun. Enzymes in the berries cause the skin to turn black during the drying process. They are the strongest in flavor.

White peppercorns are the mature berries that ripen to a red color before being picked. After harvesting, they are soaked and rubbed free of the outer skin down to the smooth white underlayer, then dried and bleached by the sun. They are slightly milder than black pepper.

Green peppercorns are the unripe peppercorns picked at the same stage of ripeness as black peppercorns, but not allowed to dry. They can be pickled in vinegar or brine. They are the least pungent.

Red peppercorns are the mature, but unshelled version of the peppercorn. One can usually find them in some gourmet and health food stores. They can be quite expensive.

Ground pepper will only stay fresh for about three months, but peppercorns will last indefinitely. To make the most of your pepper harvest, store the peppercorns in an airtight container in a cool, dark location. Grind them immediately before use for the best flavor.
There is nothing like freshly ground black pepper simply combined with a good quality olive oil and a splash of balsamic vinegar. This makes a wonderful dipping sauce for fresh bread. Simple, yet elegant. All the better if the pepper was grown in your very own garden!