How to set up indoor lighting for tropical plants

Q: My tropical plant collection goes indoors for winter. I have over 100 plants now and all windowsill space is taken. I am planning to build some shelves so I can also start some rare seeds indoors. Can you advise me on the choice of the grow lights so I can do it right?

A: Indoor plants are very unlucky: they have to grow in "caves," and everybody knows that plants don't grow in the caves. The luckiest plants win sunny windowsills, but even there they dwell rather like in underbrush under tall trees, where the sun illuminate them only early in the morning or in the evening, and its light is diffused by foliage. Usually, domestic plants are in desperate lack of illumination not only in winter but also in summer. No light - no growth, no flowering. So, plants need extra light to compensate for the lack of illumination in the "room-cave" conditions. And here is some science behind it...

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Check out our selection of tropical plants tolerant to low light conditions.

Happy Hobby: growing tropicals from seeds

Q: What is the best time to start tropical plants from seeds? Should I wait till spring?

A: If you want to feel happier, get into gardening. If you want to feel God, start plants from seeds and watch New Life grow from a tiny grain. Fall is a perfect time to start tropicals from seed.
Traditionally, people prefer sowing seeds in Spring, especially temperate species for a vegetable garden: tomatoes, peppers, cucumbers... My grandmother up North started them in early Spring in paper cups on a windowsill, then once the temperatures went just above freezing, she planted them out in the garden beds, and that early start always helped her to have the best early crop in the neighborhood.
When we deal with tropical plants, "just above freezing" is not warm enough. Which means you have to grow small babies indoors for quite a while, providing additional heating when needed. Heating pads always work best. If you keep your living space around 75F (ideal for many species), this is a perfect temperature to get your seeds started. Tropical plants are not like annual tomatoes that try to grow through the season as fast as possible. They take time. So the sooner you start, the more chances to get small seedlings just in time when Spring air outside is "warm enough" for those tropicals - at least in 70's.
A great advantage of starting tropical seeds indoors is controlled temperature and moisture. In the plant world, environment extremes are not good for the germination process. Mild conditions of your home or a greenhouse create better chances for successful growth. Seeds won't get overheated in the hot Summer sun, and won't rot because of a sudden heavy rain. Just keep in mind that some species require light for good germination.
For the best seed germination:
- Use only well-drained mix - we recommend special Seed Germination Mix #3, professional grade. Put seeds not too deep (1/2 inch deep or less) to allow air circulation
- Soak large seeds for a few hours with Sunshine-S solution
- Keep warm (75-85F) and in bright light
- Keep soil slightly moist but not soggy
- Apply micro-element booster SuperFood to baby seedlings for vigorous growth

Growing tropicals from seeds.

From Kristi the Wizard of Rose: I grow many plants from seeds, both for my personal collection, and for TopTropicals. I receive many questions from customers who want to grow tropical plants from seeds. Some of them live in colder climates and try to extend growing season of their tropical collections by starting new varieties early in the year from seeds. These are a few tips that may be helpful.

Q: What do I need to do to speed up germination process?

A: Many factors affect germination. Considering you get fresh seeds (for example from TopTropicals) and Mother Nature gives them a good kick start, there are a few things that may speed up germination:
1) Scarification. Large seeds with a hard outer shell can be slightly sanded down just enough for moisture to get inside to wake up the seed during the pre-soaking. Be careful not to damage the seed. See example of Lotus seed scarification.
2) Pre-soaking. We recommend pre-soaking most of the seeds for only a few hours (3-8 depending on species. Some seeds are very sensitive to moisture and may start rotting if stay wet without air circulation. Small seeds, especially tiny ones like dust, should not be soaked.
3) SUNSHINE-S treatment. Adding a few drops of SUNSHINE-S booster when pre-soaking seeds increases their germination rate 3-5 times.
4) Temperature. Warm temperatures help germination. If grown indoors, put seeds containers or trays in the warmest spot of your house; you may use heat pads. Outdoors, putting them in full sun helps a lot, just don't let soil to dry out.

Use only special porous seed germination mix to provide air circulation and prevent seeds from rotting.

Q: Should I keep seeds in refrigerator before planting?

A: Do not refrigerate tropical seeds. Stratification (treatment with cold) works only for temperate species, and some subtropical (like non-tropical Magnolias)

Q: How do you grow eucalyptus from seeds? I tried a few times with no success.

A: The secret of germinating tiny seeds like eucalyptus is - to sow them on top of the moist soil surface (soil must be very fine and soft), without covering. Keep container covered with clear plastic, in bright light. Use spray bottle to keep surface moist but not soggy. I have a customer who germinates eucalyptus seeds using an old fish tank, covered with a glass. Perfect environment - bright light and moist all the time.

New video: Royal Poinciana
The most beautiful tropical shade tree

"The Royal Poinciana is one of the most spectacular flowering trees in the USA, and probably among the top 10 on this planet. In full bloom, it is like a regal elephant caparisoned in red and yellow brilliance." (Larry M. Schokman, The Kampong, National Tropical Botanic Garden)
One of the most conspicuous flowering trees seen in the tropics, Royal poinciana (Delonix regia) has bright fiery red/orange blossoms cover its mimosa type leaves which close up and go to sleep for the night. This large tree, which naturally assumes a spreading umbrella shape, is now found in gardens, parks, and planted along streets throughout the tropics. In late spring, as the new leaves appear, the tree is covered with masses of five-petalled red flowers resembling orchid flowers. Blooming is followed by long, flattened, leathery dark brown or black seed pods. Delonix requires full sun and adequate space to take its characteristic form....
Read Article about this tree.

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