Plant of the Month: Golden Dewdrop - Duranta erecta

Stevie's Pick: what's in bloom?

Our exotic plant grower Steven Gowdy is featuring the most interesting plants he discovers and recommends today while working in TopTropicals greenhouses.

Duranta - Golden Dewdrop - is simply stunning with cascading flowers in abundance. Either it has lavender, blue, or solid white flowers, it is a sight to behold. The popular name Golden Dewdrop is inspired by the clusters of bright orange-yellow berries that follow the flowers, in such quantities that they often cause the slender branches to droop gracefully.
Duranta erecta blooms off and on all year and can be pruned to size as a bush or a standard tree. If let go, it can grow up to 20 feet tall and wide.
Durantas are excellent butterfly and hummingbird attractors. They will complement your tropical garden or a stand alone in your Southern landscape. Great for providing a color contrast in the landscape, they are especially well-suited as a bright-colored background or screening.
White Golden Dewdrop has pure white flowers that appear in loose clusters, and both berries and blossoms are often seen on a plant. This evergreen fast growing shrub spreads and arches to 10 feet tall and wide and is great for live hedges and covering fences and corners.
Variegated variety, also called Variegated Sky Flower, is grown for its summer flowers, and very showy leaves that are dark green with bright white variegation and creamy-yellow margins around the one inch long serrated leaves.. In the summer, cascading clusters of blue tubular flowers appear followed by wonderfully contrasting orange-yellow berries.
In mild climates, Durantas can be in flower nearly year round with flowers and fruit appearing at the same time. It does best in full sun with frequent deep watering and is pretty hardy, to about 20-25F. It is a good choice for espaliers, as a small tree or large bush; all forms benefit from frequent selective pruning. Prune back in late-winter to encourage a more compact shape and strong flush of fresh spring foliage. Requires moderate watering in a well-drained soil.

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: 20 Dec 2019

Plumeria cold protection

Q: We have a purple-flowering plumeria which resides on our sunny deck during the warm months and then Winter vacations on our back porch where we can close the plastic film windows and where it stays above 50 degrees (overnite) until it can get moved outside again. We live in zone 8+ in South Carolina and I would love to plant it outside. Do you think if we ghost-covered it when alerted that we would have an overnite freeze, that it would survive being planted in the ground and recover to flower when warm? I don't believe the soil in our yard has ever frozen below the top 1/2 inch or so, and never for more than a few hours at a time. What do you think?

A: Plumerias are tropical plants, which means, they need frost-free environment. Even if the ground is frozen only on "the top ½" or so"- this may be enough to kill the plant. From our experience, plumerias can withstand a few hours of windchill frost (not frozen soil), but even if they survive, they may get some branches damage, and recovery may take so long that the plant may not even bloom the next year. So I wouldn't take that risk even with a ghost-cover cold protection. We have customers who grow tropical plants in the ground in colder areas, but they have greenhouse protection: this means, the soil is warm and the air temperature is maintained above 45-50F. For example, this Greenhouse in Virginia.

We recommend to continue growing your rare plumeria in container and move it inside when temperatures drop below 50F (recommended) and for sure when they drop below freezing. Plumeria can take a cold night (a few hours of upper 30's) as long as it is followed by a nice warm sunny afternoon with at least upper 50s. Otherwise, keep it indoors. The good news is, since plumerias are deciduous and have no leaves in winter, low light level won't affect the plant.
Just make sure to minimize watering and keep the plant on a dry side until it starts growing new leaves in Spring. You may continue fertilizing once a week with half-doze of Sunshine boosters - Sunshine TotalFeed. This will maintain the plant healthy and prepare for the blooming season in Spring.

Date: 28 Sep 2019

Fragrance of Angel Hair Jasmine

Q: I got angel hair jasmine, it started flowering, but it does not have any smell. What can be done?

A: Jasminum pubescens - Angel Hair Jasmine has very fine fragrance. It is not as strong as some other jasmines like Sambac for example. However flowers do have a sweet scent especially in the early morning hours, as long as the plant is well-established, grows in a warm and humid environment. Keep in mind that flowers on young small plants that do not have a developed root system, may not be as fragrant as on mature vigorous specimens. Also, this jasmine needs a full sun location and regular fertilizer for profuse flowering.
We recommend the following fertilizers to boost flowering energy:
- Pink N Good Daily Plant Food - Flower Booster
- Plumeria Top Dress - Smart-Release Booster
Use microelements at least once a month to improve plant vigor and quality of flowers

Date: 25 Jun 2019

How soon will Guava tree fruit?

Q: Can you tell me how your Guava trees are propagated? Grown from seed vs. air grafted, etc.? I'm interested especially in the Barbie variety. In particular, I'd like to know how long it takes them to bear fruit - I live in Southern California zone 10b, with good sunlight.

A: Guavas can be propagated by seed, air layers, or grafting. Propagation method depends on the species.
Cattley guavas - Psidium littorale - are usually grown from seeds and start flowering and producing as early as in 2-3 years from seed. Tropical guavas, Psidium guajava - especially named varieties, are propagated usually by air layers, and the rarest varieties like Variegated Honey Moon are often grafted, although they will come true from seed (it's just takes them longer to fruit). Both air-layered and grafted plants start producing right away, usually on the same year of planting or next year, depending on growing conditions.
Barbie Pink is a superior variety, very popular among fruit lovers. It produces large aromatic fruit with a bright pink pulp and very few seeds. This variety is air-layered; in our nursery, these plants start flowering and setting fruit in 3 gal containers.
Plant this tree in full sun and provide regular watering, guavas don't like to dry out. Use fertile soil, with at least 50% of compost, and add some soil conditioning components for better drainage: bark, sand, perlite, etc. Mulch well, just make sure to keep mulch 2-3"away from the trunk. Follow our detailed planting instructions that come with every plant, and you are good to go!