Date: 6 Dec 2025
🌿 Bring the Jungle Inside: Winter Survival Guide Part 2.Temperature. ❄️
Smokey: Too cold. We need more heaters so the plants feel comfortable.
Sunshine: I feel comfortable.
Smokey: You are not part of my plant collection, but I am glad you are comfortable.
🌡️ TEMPERATURE: THE TROPICAL DORMANCY LINE
In Part 1 (Winter Survival Guide: Temperature) we covered the foundation: light, placement, and acclimation. That is the survival layer.
Most tropicals stop growing below 70 to 75 F. They stay green, but their engine shuts down.
Below 70F:
- Water intake drops.
- Roots slow down.
- Fertilizing becomes risky.
- Root root becomes easy.
If you WANT your plants to grow in winter, you must take care of everything: Warmth, light, humidity, water. It all works together.
- Aim for 75 F with bright light. Water lightly. No fertilizer.
- Watch out for drafts. Cold windows. Door blasts. Garage entryways. Even one gust can trigger leaf drop.
- Vents are the opposite problem: hot, dry, dusty air. That gives you crispy edges and mites. Root zone temperature matters just as much as room air. Your thermostat may say 72 F, but your pot on a tile floor may be sitting at 55 F. Fix this by elevating pots on boards or stands. Use Styrofoam. Never keep pots directly on cold tile o windowsill
- Extra winter heat: Space heaters are fine if used smartly. Do not blow hot air directly on plants. Keep heaters away from cords, trays, and water. Oil filled radiators are the safest option for plant rooms.
- Use a humidifier if you want growth or want to prevent spider mites. But do not blow mist directly onto leaves. Always place the unit lower than the plant canopy.
- Grouping helps. Put tropical plants close together to share humidity. Do not mix succulents with humidity lovers.
- Cats and dogs love to knock over lights and stands. Secure your fixtures. Trust us.
- Airflow: Light airflow is healthy. Direct fan blast is not. Still, dry corners invite mites.
- A mild night drop is OK. A big one below 55 F will stop growth completely.
A mandevilla thriving indoors with bright pink blooms and glossy green leaves.
☂️ PLACEMENT: MICROCLIMATES RULE EVERYTHING
Indoors is one big tradeoff: light but cold near windows, warm but dim away from them. The winning combo is a warm room with supplemental light.
Best zones to keep plants in winter:
- South or east windows with additional light
- Warm living spaces
- Bright bathrooms for natural humidity
Worst zones to keep plants in winter:
- Behind curtains
- Directly on windowsills
- Near heaters or vents
- Against cold exterior walls
- Dark corners without supplemental lighting
A vigorous indoor philodendron stretching across the window.
💨 ACCLIMATION
Moving a plant from outdoors to indoors is a shock. Light drops. Humidity drops. Airflow stops. Soil cools. Even healthy plants may drop some leaves for a few weeks. That is normal.
Before you bring them inside:
- Rinse foliage to remove dust and pests. We recommend Sunshine NoBug - and organic, safe solution.
- Check for ants.
- Trim weak branches.
- Treat soil if fungus gnats are present.
Try to bring plants inside before the first cold front, not after. If you are reading this too late, do the prep now and expect a little leaf drop.
If you nail light and temperature, winter becomes simple. In the next mail-list we will cover watering, fertilizer timing, humidity, and other indoor tricks that keep tropicals happy till spring. Stay tuned.
Cat Bob is inspecting his indoor garden around the tub with a bright skylight
✔️ WINTER INDOOR FAQ: TEMPERATURE AND PLACEMENT
Q: Why are leaves dropping only on the window side?
A: Cold glass. The room may be warm, but the glass surface can be much colder.
Q: Is a cold room OK for tropicals?
A: They may survive, but they will not grow below about 65F to 75F. When nights stay below 65F for a week, many plants enter dormancy.
Q: My room feels warm. Why is my plant still not growing?
A: Check the soil temperature. Pots on cold tile can be 10 to 20F colder than the air.
Q: Can plants sit directly on the floor?
A: Not on cold tile. Always elevate them on boards, stands, or trays.
Q: Is it OK to keep plants near a heater or vent?
A: No. Vents and heaters blast hot, dry air and cause crispy leaves and mites.
Q: My plant is dropping leaves after coming indoors. Why?
A: Normal acclimation to reduced light and humidity right after the move.
Q: Can I keep plants in a bright bathroom?
A: Yes. Bathrooms can have good humidity. Just keep pots off cold tile.
Q: Do I need a humidifier?
A: Not for survival. Yes if you want better growth and fewer pests like spider mites.
Q: Do I need a grow tent?
A: No. A bright LED plus a warm room is enough for winter holding.
Q: Should I fertilize in winter?
A: Not now. Winter fertilizer rules will be covered in the next mail-list.
Q: Should I water the same as in summer?
A: No. Indoor plants need much less water in winter. Watering rules also coming soon.
📚 Learn more:
- Bring the Jungle Inside: Winter Survival Guide Part 1: Lighting
- SUNSHINE NoBug - Natural Plant Protector
- How to overwinter tropical plants indoors
- Feeding indoor plants
- Overwintering Adeniums outside of tropics
Date: 24 Jun 2018
Adenium: a Rose by any Other Name
New
article by Jane Jordan.
"...The famous quote is often used to imply that the names
of things do not affect what they really are, in the case
of The Desert Rose (Adenium obesum) it is not a rose at
all, rather a succulent that thrives in hot, dry and sunny
conditions. These spectacular plants have no relation to
the rose family, they are a species of flowering plant
from the dogbane family, Apocynaceae. The naming of this
plant is partly correct as they originate in sub-Saharan
Africa and the Arabian Peninsula, where they can grow into
large trees with huge swollen trunks..."
Continue reading...
Date: 19 May 2016
Care of mail-order plants during hot summer
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
Date: 10 Apr 2016
Growing by the sea
Q: Please recommend me some interesting plants that can grow on my waterfront property and can withstand some salt wind. All my neighbors have Sea Grape trees and bougainvilleas, and I want something different and special. I would love to have some colorful or fragrant flowers, or fruit around my paradise home.
Q: Considering your neighbors successfully grow Sea Grape (Coccoloba), and Bougainvilleas, you have a mild, frost free climate. There is a number of spectacular and useful tropical plants that are salt tolerant. Orchid Trees - Bauhinias, Poincettia - Delonix, and Geiger trees - Cordias, are very showy flowering trees. For large size bushes, try Dwarf Poincianas - Caesalpinias, and Scarlet-Coral Erythrinas. Frangipani - Plumeria, come in different colors and bring you perfume fragrance from Hawaii. And of course, Desert Roses - Adeniums, can be grown and showy specimens anywhere in your yard, both in the ground or as potted bonsai.
Most palms, especially popular Coconut Palm, source of tasty fruit and drink, are highly tolerant to salt breeze. If you are looking for something that nobody has, Lipstick palm, or Sealing wax palm - Cyrtostachys lakka, is definitely the most spectacular palm you can find. It is a stunning feather palm that develops a brilliantly red trunk. Palm is originally from Malaysia, but has been introduced to Costa Rica and other tropical areas of the world. Sealing Wax Palm seeds are very slow to germinate, up to a year, and large specimens are very rare and hard to find even in rare tropical plant nurseries. This palm will require a good overhead light, and constant warmth (above temperature 55F). It is definitely worth an effort to grow this beauty.
You may add more tropical accents to your landscape by the sea with many varieties of showy heliconias.