Pot Shots: Elephant Ears

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All of the various ‘elephant ears’ love our coastal Virginia heat and humidity.  They grow visibly each day, generously sending up new leaves so long as they are kept watered and their soil is rich with nutrition.  This pot of Caladiums, Alocasia and Colocasias was just potted up yesterday.  it looks a bit sparse at the moment, but will soon fill in very nicely.

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Caladium ‘Pink Splash’ will grow to two feet in partial sun.  It grows with a Begonia, a dark purple hybrid Colocasia and Alocasia ‘Portora.’

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Caladiums are hardy only to Zone 10, but it is easy to dig them up and dry them in November, saving them inside over the winter to grow again the following year.  Keep even their dormant tubers at 65F or above.  The Caladium ‘Southern Charm’ is a new hybrid that grows in full to partial sun.

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Alocasias are hardy to Zone 8 or 9, and so they can be brought indoors in pots and kept alive in a garage or basement over winter.  I’ve not had good luck with digging and drying their tubers, but kept our best Alocasias in full leaf and growing all winter in our garage.

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I bought this Alocasia at Trader Joes last winter and don’t know its cultivar name. It will be interesting to see how large it grows.

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Most Colocasias are also hardy only to Zones 8 or 9, though there are a few that will survive our Williamsburg winters in the ground.  They spread by stolons and so increase each year.

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Colocasia ‘Mojito’, hardy to Zone 8, spends its winter vacation in a pot in our basement.  This division is quickly outgrowing its pot in our new little water garden.  Many Colocasias grow happily in a pond or boggy ground.

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When kept from year to year, all three of these elephant ears calve off new tubers and increase.  Their tubers grow a bit beefier each year and produce larger plants each summer.  If you like elephant ears, and take simple measures to help them through winter, you will soon have plenty to grow and more to share.

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Colocasia ‘Pink China’ is hardy in our Zone 7 garden.  Alocasia ‘Sarian’ grows in a pot with Caladium ‘White Queen.’

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The potential size of most Colocasia and Alocasia hybrids is determined by available light, moisture, and how much room you give their roots to grow.  They may grow to 6′ high or more when their needs are met.  They always grow larger planted into garden soil than when grown in a pot.  But, it is easier to keep them alive year to year when they live in a pot.

When potting or re-potting, I mix some Espoma Plant Tone into the potting mix.  Depending on the mix, I often add some additional perlite to improve aeration and drainage.  Mulch the soil with pea gravel or aquarium gravel to neaten up the presentation while helping to retain moisture for these thirsty plants.  Finish with a sprinkle of Osmocote time release fertilizer to keep them well nourished every time you water.

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This Alocasia kept some leaves through the winter in our living room.  It is sending up new growth now that it is back out on the patio.

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If you want to grow something truly spectacular in your summer pots, and something that needs very little care or attention from the gardener, try any of these beautiful ‘elephant ear’ plants.  Add a Begonia or two for blooms, and you will have your own bit of tropical paradise in your summer garden.

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June 6, Alocasia ‘Portora’ has begun to grow surrounded by Caladium ‘Southern Charm.’ By next month this time, the Alocasia, which can grow to 6′,  should be significantly taller than the Caladiums.

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Woodland Gnome 2019
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These Colocasias are just getting started on their summer growth.

 

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New Caladium Plants From Older Leaves

A Caladium leaf, rooted earlier in the summer, grows on in a small pot.  Each new leaf the plant produces is a bit larger and more colorful.

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When transplanting newly sprouted Caladium tubers from the boxes where I started them, into their permanent spots, a few leaves broke away.  Back in May, I showed you how these leaves, still with a bit of the tuber attached, rooted in water.  I was able to pot these rooted leaves, and they have continued growing all summer as independent Caladium plants.

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This leaf has been living in water for better than six weeks. I finally noticed a root growing from the stem early last week.

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As the summer has gone on, I’ve tried rooting a few more leaves that broke away.  Some have rooted and others have not.  Rooting definitely depends on having a few cells from the tuber at the bottom of the petiole.   I wondered, too, what effect the age of the leaf might have on its ability to strike roots.

I’ve had this particular leaf in a small jar of water on my kitchen windowsill for better than six weeks.  I’ve seriously considered composting it several times over the last month because I wasn’t seeing progress and the leaf grew increasingly dull.

But where there is life there is hope.  It took up no more space in my window than a quarter, and I left it alone, only changing out the water from time to time to keep it fresh.

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It was early last week when I noticed the first tiny root tip protruding from the stem.  Oddly, it wasn’t growing from the base of the stem.  It was growing out of the stem itself, where it grows concave and folded over on itself near the base.

It has been a busy week and I’ve not had time to do more than simply watch it.  But yesterday afternoon, I took a closer look.  And imagine my absolute delight to find not only roots, but an entire new little plant growing from the stem!

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When I examined it again this morning, I saw that fragile root is actually a couple of inches long now and branched.  There is a tiny new leaf fully formed, and the beginnings of more.  It was clearly time to pot this up in soil and give it room to grow.

This particular leaf was a month or two old before it broke away.  It wasn’t a newly sprouted leaf like those I rooted so successfully this spring.  That means that leaves of various ages may be rooted, so long as one has the entire petiole, right down to where it grows out of its tuber.  Having a bit of root attached already makes the propagation even more successful, and certainly faster.

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I’m not sure what the implications of this might be for the home gardener.  Already, we increase our stock of tubers as we dig and save the plants in fall.  What was planted as a single tuber in spring has grown over the season, and often it has divided itself into several new pieces.

When we dry these and keep them over winter, we have more tubers to plant the following spring.  Even tiny tubers the size of a blueberry will sprout and grow on, producing leaves and increasing through the season.

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Remember to mulch the soil with perlite, vermiculate or fine pea gravel to conserve moisture and reduce soil borne disease. I like to keep small, newly rooted plants like this in a reservoir for the first few weeks. You don’t have to leave the plant in standing water. But this plant was growing in water before it was potted up. Never allow the pot to completely dry out.

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It might be worth the effort to try rooting Caladium leaves in autumn, as we dig our tubers.  I often dig plants that are still in full beautiful leaf.  Sometimes I cut the leaves and enjoy them in a vase for several more weeks.  The alternative is to let them wither and fade, finally pulling them off and composting them when we gather our dried tubers for storage.

If you decide to try rooting a leaf or two this fall, remember to keep each leaf in its own small container of water, and keep that water clean so bacteria doesn’t grow.  I use the syrup bottles from a popular chain restaurant with great success.

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Caladium ‘Chinook’ and C. ‘Highlighter’ have put on a beautiful, ever changing display, all summer.  Soon, I’ll dig the tubers out of this pot to dry them and store them for next year.

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The Caladium always needs warmth and bright, filtered light.  Windowsill propagation works during the spring and summer because the windowsill maintains a comfortable temperature.

I’m not sure how the Caladium might do once nights drop below freezing, and the windowsill temperatures dip lower, too.  But for a gardener who has a light set up to propagate seeds in late winter and spring, it might be worth the effort to root leaves in the autumn and grow these on indoors as potted plants through the winter.

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Caladium ‘Moonlight’ is planted in the pot with a large cane Begonia. It has grown happily here, peeping out of the pot.

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Please keep in mind that these plants could only be used in one’s own garden.  Many, but not all Caladium cultivars are patented.  But there are many situations where a rooted leaf may be included in potted arrangements, where a tuber and full-sized plant may not fit.  Rooted leaves are especially nice in small, decorative ceramic pots and in hanging baskets.

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Here C. ‘Moonlight’ grows in its own pot, without competition. This is a single medium sized (#2) tuber after a summer’s growth.

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As you grow and enjoy Caladiums, please keep in mind the other  ‘elephant ear’ plants.  These plants share the virtues of large, colorful leaves and simple needs.

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Colocasia ‘Black Magic’ shares a pot with Begonia ‘Flamingo.’  Black Magic is known for producing many runners and spreading itself out generously.  It needs shade, evenly moist soil, and can’t freeze.

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They are low maintenance plants.  Their leaves all contain compounds which make them unpleasant to eat for the browsers in the neighborhood.  They cause burning in the mouth and upset stomach.  Even if you loose a leaf or two, rogue deer will quickly learn to leave your elephant ears alone.

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Here, a runner is pegged into a new pot to root.

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Colocasias have the added benefit of spreading themselves around by runners.  These special stems creep around the ground for a ways, and then strike roots and grow new leaves.  When you see runners form, you can peg them down where you want an additional plant, or you can set a prepared pot under the runner and allow it to root into the pot.

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Peg the runner into an empty spot in the parent’s pot to create a fuller display.

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Cut the runner once the new plant has a few leaves and is well rooted.  Once you have a plant going, you can continue producing new plants indefinitely, and create your own tropical plant filled paradise each summer.

Caladiums, Colocasias and Alocasias are all easy to grow and easy to propagate.  If you enjoy playing with your plants, and not just admiring them, see what you can easily do yourself to increase your collection.

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Woodland Gnome 2018
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