Iochroma Plant Care – How To Grow Iochroma Plants

Iochroma Plant Care – How To Grow Iochroma Plants

By: Mary H. Dyer, Credentialed Garden Writer

Often known as mini angel trumpet or violet tubeflower, Iochroma is a dazzling plant that produces clusters of intensely purple, tube-shaped blooms throughout summer and early autumn. This fast growing plant is actually a member of the tomato family and is a distant cousin of brugmansia, another absolute stunner. If you’re looking for a sure-fire hummingbird magnet, you can’t go wrong with Iochroma. Want to learn how to grow Iochroma plants? Read on!

Iochroma Growing Conditions

Iochroma (Iochroma spp.) is suitable for growing in the warm climates of USDA plant hardiness zones 8 through 10. However, most varieties can be grown successfully in climates as far north as zone 7, but only if the roots are well insulated with a layer of mulch. If temperatures drop below 35 F. (2 C.), the plant may die to the ground, but will resprout in spring.

Although Iochroma prefers full sunlight, the plant benefits from shade in warmer climates where temperatures regularly top 85 to 90 F. (29-32 C.).

Iochroma prefers well-drained, acidic soil with a soil pH of around 5.5.

How to Grow Iochroma Plants

Iochroma propagation is easily achieved by taking cuttings from an established plant. Alternatively, plant seeds in small pots filled with well-drained potting mix.

Place the pots in a warm room where they receive filtered sunlight. Watch for the seeds to germinate in about six weeks. Give them a few more weeks to mature, then plant in a permanent location within the garden.

Iochroma Plant Care

Caring for Iochroma plants is just as easy and minimal.

Water Iochroma regularly and always water at first sign of wilt, as the plant doesn’t recover well from a severe wilt. However, don’t overwater and never allow the plant to become waterlogged. Be sure container-grown Iochroma is planted in well-drained soil and that the pot has at least one drainage hole.

Fertilize Iochroma monthly during the growing season using a balanced fertilizer with an NPK ratio below 15-15-15. Plants in containers benefit from regular application of a water-soluble fertilizer applied according to label directions.

Prune Iochroma after blooming. Otherwise, prune lightly as needed to keep growth in check.

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SERIES 16 | Episode 04

One of John's favourite shrubs, and one he's grown for many years is a beautiful plant called Iochroma cyaneum. It comes from north western South America and it's one of the nightshade family, so be careful, these are poisonous plants. But what they do produce are fantastic tubular flowers. Iochroma comes from the Greek meaning purple flower.

Iochroma cyaneum has big quite felty leaves. It grows to about 3 to 4 metres and needs a sunny, warm position. Frost would be its big no no, they really hate that winter cold. So if you're a little bit doubtful, grow it in a protected position where it will get some reflected heat from a wall. John prunes his right down to ground level in Autumn or after flowering. It starts flowering again in December and flowers right the way through until late summer. It needs some summer moisture, but not a lot. Use it at the back of a shrub border to add some height, and then plant other things in front of it. This is a plant for south eastern Australia, except where it gets frosty. So plant from northern New South Wales, down the coast to Tasmania, as long as it's not too cold. It also does well in Adelaide and Perth.

This plant sends out strong suckers so if you live in the warmer, wetter areas of Australia where it could get away, keep it in a pot.

Comments (7)


It looks like Iochroma to me,but there is also a shrub from Australia that looks something like that.I ordered some seeds and tried to grow it,but had no luck.Can't remember the name.I have tried so many things that I saw and liked over the years.Take a cutting and root it and see what you can do.That is if it is near you.Good luck Jessie


I don't know what it is, but I want that! How do you propagate it?

Iochroma grandiflorum

Photo - Linda Ross

Description: around 30 species of Iochroma hail from Central and South America. All produce fantastic tubular flowers and have slightly sticky, hairy leaves. I. grandiflorum features deep, purple-blue flowers that birds love. Iochroma grandiflora and its close relative Iochroma cyaneum are similar to species fuchsias and angels trumpets, in the Solanaceae family. They flower throughout summer and autumn, with flush after flush of long tubular bells in blue or purple, some cherry red, orange and scarlet!

Size: They have big quite felty leaves, grow to about 3-4m and needs a sunny, warm position. They hate the cold, so find a warm semi shaded position for them to thrive

Cultivation: a frost might prune the brittle stems back to the ground, but they grow back. Iochroma strikes easily from semi-hardwood cuttings taken in summer.They'll soon start flowering again in December. Cut back hard after flowering.They like sunny to semi-shaded spots in well-drained soil and do well in pots. Keep up the organic matter.

Special comments: Iochroma are close relatives of Brugmansia. Both are poisonous. This plant sends out strong suckers so if you live in the warmer, wetter areas of Australia where it could get away, keep it in a pot.

We like it: at the back of a shrub border to add some height, and then plant other things (like Ixora) in front of it.

Kitten Habitat

Dormeuse, amas doré d’ombres et d’abandons … — Paul Valéry
(The sleeper, a golden mass of shadows and abandonments …)

Thanks to the neighborhood cat lady, we have an abundance of more or less free-range felines in our area. One found a cozy place to nap in the Norfolk Pine container (which probably had a nice layer of compost on top). The catnapper was soon joined by a more vigilant sibling.

In the front left is Protasparagus densiflorus ‘Meyeri’ (foxtail asparagus fern). At the right is a handsome speciment of Stipa arundinacea (New Zealand Wind Grass), which does marvelously well in this area, even during the drought. (I recently saw quite a few of these planted along the bay walk in Pacific Grove near Monterey.) Along the fence is true jasmine, and behind the Norfolk Pine (Araucaria heterophylla) in another container is Iochroma coccinea, with its tubular orange flowers.


Usually by seeds. Germination often occurs quickly but seeds can go dormant and occasionally need several weeks to a couple of months to overcome dormancy.

Almost exclusively grown as an ornamental. The plant has some historical uses by local medicine men in its native range as the plant contains a number of alkaloids and hallucinogens much like its relatives the Brugmansia's and the Datura's. It should also be noted that the all parts of the plant are likely toxic if ingested in any way.

Watch the video: Iochroma. Acnistus australis. иохрому