Date: 2 Mar 2026
😼😺 The Story Behind Smokey and Sunshine 🐾
Smokey: Not so fast, genius. Twenty five degrees is not the North Pole. And polar bears and penguins do not share zip codes.
Sunshine: You always pour cold water on my brilliance. Fine. Where do we start?
Smokey: Well, first you go talk to Tatiana. She graduated from the Geography Department. She can explain climate zones. Cherry of the Rio Grande can grow in North Florida, Texas, and similar climates. Let’s master that before we conquer Arctic.
Sunshine: So… Phase One: Geography?
Smokey: Exactly.
Some stories are easier to tell with a little humor. Smokey and Sunshine were never just mascots. They represent the two forces behind every decision we make here: bold ideas and careful reality. One dreams big. The other checks the climate zone map. Together, they remind us that growing plants is part science, part optimism, and always personal. If you have ever wondered why they keep appearing in our newsletters, you can read their full story on the Smokey and Sunshine page. They have been with us longer than most people realize.
🐾 Learn the Story of Smoky and Sunshine
Freeze Testing of Grumichama and Cherry of Rio Grande 🍒❄️
When temperatures dropped to 25F, with wind chill near 14F, winter made it clear which tropical trees were truly resilient. Some plants burned back. Tender growth collapsed. But our established Eugenia cherries stood steady. Leaves held. Branches stayed flexible. The canopy remained intact.
Cherry of the Rio Grande (Eugenia aggregata) and Grumichama (Eugenia brasiliensis) are among the most cold-hardy tropical cherries for Southern gardens. Both are native to Brazil and thrive in USDA Zones 9b–11, and even protected 9a sites.
Cherry of the Rio Grande produces dark ruby fruit that ripens almost black, with a rich, full cherry flavor. It flowers early in spring and can fruit well into summer. Mature trees can tolerate brief drops into the low 20s once established. Trees typically grow 8 to 15 feet tall, remain naturally compact, and often begin fruiting within 2 to 3 years.
Grumichama is an evergreen tree known for both beauty and productivity. In spring, it covers itself in white starburst flowers that attract pollinators. Within about four weeks, glossy purple-black fruit develops. Established trees tolerate temperatures into the upper 20s and grow well in the ground or in 5–10 gallon containers. Mature trees can produce hundreds of fruits per season.
Across the Eugenia group, strengths are consistent: early bearing, compact growth, heat tolerance, light freeze endurance, and low pest pressure. They are adaptable to different soils, need modest water once established, and perform in full sun or partial shade. Birds enjoy the fruit, but there is usually plenty to share.
Nutritionally, Eugenia cherries provide Vitamin C, fiber, antioxidants, and notable Vitamin A that supports eye health. They offer sweetness with real dietary value.
In the kitchen, they are simple and rewarding. Cherry of the Rio Grande makes an easy compote. Simmer the fruit with a small amount of water until soft, mash lightly, and spoon over pancakes or warm bread. Grumichama turns into a deep red jam with sugar and lime, or can be blended into a bright spoon drizzle over vanilla ice cream.
Even when not fruiting, both trees remain attractive year-round with glossy evergreen foliage and clean structure. They fit well into edible landscapes, small yards, and container gardens.
Winter will return. The difference lies in planting fruit trees that can handle heat, humidity, and the occasional cold snap. If you are building a food forest for lasting harvests, cold-hardy tropical cherries like Cherry of the Rio Grande and Grumichama deserve a place in your garden.
Date: 5 Mar 2023
How to move plants from indoors to outdoors
Q: When moving my tropical plant collection outside in the garden, what do I need to know to get them adjusted to this change?
A: As a tropical plant gardener, it's important
to assess the temperatures outside before moving your plants outdoors. Most
tropical plants thrive in sustained temperatures above 60F.
Moving your plants outside during the summer creates optimal growing
conditions for sun-loving plants, providing them with more light and warmth than
they can ever get inside. This active time of growth, along with the outdoor
conditions of humidity, heat, sunlight, and natural day length, gives the plant
a chance to experience growth in an outdoor environment, making for a much
stronger plant.
However, be aware of sun burn. Direct sunlight can burn patches of
white or brown on the surface of the tender leaves, so it's best to move your
plants outside by hardening them off first. Gradually increase the amount of
direct sunlight they receive over several days before moving them into full
sun.
It's also a good time to prune your plants and repot them if needed,
providing better aeration to the root system. But avoid root pruning as it
can make your plant susceptible to disease and shock.
Overall, moving your tropical plants outside encourages their natural bloom
cycle and provides extra vigor for the upcoming indoor season. However, be
aware that you may have to deal with insects when you bring your plants
back inside in the fall, so use preventive sprays like Sunshine NoBug before bringing them back inside. Leaf drop is
also common when plants come back inside, so make sure to provide a well-lit
location.
When moving plants outside, it's important to provide them with proper
nutrients through fertilization. Outdoor conditions can deplete the soil
of essential nutrients, so giving your plants a boost of fertilizer before
moving them outside can help them acclimate to their new environment. Apply Sunshine Boosters
with every watering, include micro-elements and bio stimulants to boost their immune system.
Date: 6 Dec 2018
Seven rules of cold protection for tropicals
Q: I was always wondering how you guys manage to grow true tropical trees in Florida? I live in Puerto Rico and we have Breadfruit trees growing here in a wild... but my sister lives not far away from you, in Orlando, which is much colder, and I wonder if I can get her a Breadfruit tree for Christmas?
A: Your
sister can grow a Breadfruit tree in Orlando either in a pot (and bring it indoors during
cold periods) or in the ground inside a structure (an elclosed conservatory
with heating system). See our customer's Greenhouse in Virginia. Cold protection of tropical plants is a lengthy
subject and we have many interesting publications about it in our managine
Tropical
Treasures and on the website. In a nutshell, when growing tropicals outside of
tropical climate, you need to follow these 7 rules:
1. Cut watering to a minimum. Cold+wet kills tropical roots.
2. Water thirsty plants before a cold night. Jucy leaves have fewer
chances to be cold-zapped.
3. Wind protection is more important than a temperature drop. Plant
tropicals close to a house or surrounded by other trees.
4. Duration of a cold period is more critical than the cold itself. If
expecting long cold hours, bring up all available protection resources.
Christmas lights or propane heaters - as long as there is a heat source,
everything helps!
5. Remove plastic covers during the daytime so plants don't get
"cooked" in the sun. Fabric covers are better than plastic.
6. Grow ultra-tropicals in containers and bring them inside the garage
or even indoors during the cold.
7. Use SUNSHINE plant boosters and feed your plants well during Summer to improve cold hardiness.
Related topics:
About Cold Protection
Cold protection - winter action for your plant collection
Improving cold hardiness before winter: fertilizer and micro-elements
Cold hardy tropical fruit trees
Date: 7 Aug 2025
Randia formosa - Blackberry Jam Fruit Tree with Flowers and Ripe Fruit
You know how some plants just surprise you?
That's Randia formosa - the Blackberry Jam Fruit Tree. At first, it just looks like a cute little gardenia-type shrub. Glossy leaves, sweet white flowers. Nice enough. But then the fruit shows up… and you crack one open and go, “Wait - this tastes like jam?!”
And not just any jam - like real, fresh blackberry jam. No sugar, no cooking. Just soft black pulp inside this golden little fruit. It's weirdly satisfying. One of those things you make everyone taste just to see their face.
What's even cooler is how easy it is. This thing starts blooming and fruiting when it's barely 2 feet tall. You can grow it in a pot on your porch, or even inside if it gets enough light. And while most of your other plants take the winter off, this one keeps going - flowers, fruit, the whole show.
If you've got a spot with filtered light and a little curiosity, it's absolutely worth a try. Honestly, it's just… fun.
This rare South American evergreen shrub checks all the boxes: fragrant, compact, easy, and edible.
✅ Grows in pots ✅ Indoors ✅ Small yards
Randia formosa – Blackberry Jam Fruit Tree – FAQ
What is Randia formosa?
Randia formosa, also known as Blackberry Jam Fruit or Jasmin de Rosa, is a compact tropical shrub that produces fragrant white flowers and small yellow fruits filled with soft, black pulp that tastes remarkably like blackberry jam. It belongs to the Rubiaceae family, the same as Gardenia and Coffea.
Why gardeners love Randia
- Delicious jam-flavored fruit – no sugar needed.
- Compact grower – perfect for patios and indoor spaces.
- Fast results – blooms and fruits within 1–1.5 years.
- Big yield in a small pot – 25–30 fruits at once!
- Fall–Winter performer – keeps going when others stop.
- Kid favorite – fun to grow, fun to eat.
What does the fruit taste like?
The pulp inside the fruit tastes just like fresh blackberry jam - sweet, tangy, and rich. It is edible fresh, without any processing or sweeteners, and is loved by both kids and adults.
How big does the plant get?
In the ground, Randia formosa typically reaches 4 to 5 feet tall. In containers, it usually stays smaller, around 3 to 4 feet, making it perfect for small gardens, patios, or indoor growing.
How soon will it fruit?
Very quickly! This is one of the fastest fruiting tropicals. Plants begin to flower and produce fruit within two years from seed. Еstablished plants in 3 gallon containers may begin fruiting at just 2 feet tall.
Does it need full sun?
No. It actually prefers filtered light or partial shade, especially in hot climates. Leaves tend to look healthier and greener when grown in dappled light.
Can I grow Randia formosa indoors?
Yes! Its compact size and shade tolerance make it an excellent choice for bright indoor spaces. Just be sure to provide good air circulation, high humidity if possible, and avoid cold drafts.
How cold-hardy is it?
Mature plants can tolerate temperatures down to about 26F for short period of time, but young plants are more sensitive and should be protected from frost. It is best grown outdoors in USDA zones 9b and up or kept as a container plant that can be brought indoors in winter.
What kind of soil does it need?
Randia formosa requires acidic, well-draining soil. Avoid alkaline soils, which may cause leaf chlorosis (yellowing with green veins).
How often should I water it?
Keep soil evenly moist but not soggy. It is sensitive to overwatering, especially in cooler weather. During winter, reduce watering. Underwatering may cause sudden leaf drop - but the plant usually recovers quickly once watered again.
What fertilizer does it need?
Yes. Use a slow-release fertilizer formulated for acid-loving plants. Regular applications of micronutrients (especially iron and magnesium) help prevent chlorosis. Foliar sprays can also be helpful. Apply Sunshine C-Cibus Booster or Green Magic controlled release fertilizer to keep your plant happy: Blackberry Jam Fruit is a heavy feeder!
When does it flower and fruit?
This plant can bloom and fruit for several months, often from summer through winter. It is known to bloom off-season, making it a fun and productive plant when others are dormant.
Are the flowers fragrant?
Yes, the white star-shaped tubular flowers have a light, sweet fragrance, similar to gardenias but less intense. The flowers open at night.
Is it self-pollinating?
Yes. A single plant can set fruit on its own, although insect activity can improve fruit set.
Are there any common problems?
The most common issue is chlorosis, which shows up as yellowing leaves with green veins - usually due to overwatering, poor drainage, or alkaline soil. It's fixable with acidification and micronutrients. The plant may also drop leaves suddenly if underwatered but tends to bounce back.
Is this plant related to Gardenia?
Yes. It is in the same plant family (Rubiaceae) as Gardenia and Coffee. That's why the flowers look similar and why it tolerates similar care needs.
Can it be used for bonsai or miniature tree styling?
Yes, due to its slow growth and branching habit, Randia formosa can be shaped into a miniature tree form and is quite attractive when trained.
Is it drought-tolerant?
Once established, it shows moderate drought tolerance. However, young plants need regular watering and are more vulnerable to drying out.
Date: 10 Jun 2021
Growing Champaka in Virginia
Q: I purchased a Magnolia champaca 1 gallon a few years ago. It is still growing as I bring it into my greenhouse in the winter. I live in VA. This spring I planted it in the ground hoping it might bloom which it did not. Will it survive our fairly mild winters with several freezing days with some special attention? What would you do?
A: Magnolia champaca is a tropical tree and won't survive winter in VA. It can not take hard freeze. Your only option is, to keep it in a pot and bring inside. If the temperature inside your greenhouse is too low, this may affect the plant's ability to flower. For example, if it stays 35-40F for a whole month - although it is not a hard freeze and the plant may survive, but the duration of the cold period is more critical than the low temperature itself. Champaka can survive a few hours even at upper 20's, but not many days with cool temperatures. The temperature in winter should be maintained at least above 55F during day time (the higher the better) and at least above 45F at night.
If the tree has grown too big, you may trim it. If the root ball is too
large, roots can be trimmed too (similar way like they do with bonsai) before
repotting. However, trimming must be done either during warm season and active
growth, or in Spring, when the tree starts waking up and promotes new
growth.
To encourage flowering, start fertilizing your Champaka with a liquid bloom
booster - SUNSHINE Pikake - Fragrant Flower Booster. It can be used year round
including winter months, and it is safe to apply with every watering. This way
you will provide to the tree enough energy for the next flowering season, so
flowers can be expected in late Spring - Summer.
Read more about greenhouse growing: Greenhouse in Virginia.
