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Do you notice the difference between zonal geranium and an interspecific geranium?  I didn't know till I posted this.

4/22/2026

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image from urbanorgaicyield.com   Interspeific Geranium
image from hortipak.co.uk Image of zonal geranium 
​Good morning I am later in writing and posting as I have moved the computer to the greenhouse asI want to be here by 9:00 AM.  It is warm out, but different from yesterday because we have clouds and a breeze out of the south.  Outside temperature is 73F(22C) .  Inside greenhouse it is 80F which isn’t too bad with fans moving the air.  Again the plants are happy and that is what counts.  Hope we keep the clouds.  Enjoy the day, stay safe.
 
Australia family and friends are telling me they are having 20C which 68F.  Enjoyable fall days for them.  Iowa family is still there visiting so they are having good weather.  Their high will be the same as ours 74F(22C) Opposite seasons but same temperatures.  I find that amazing.  Enjoy the day, stay safe. 
 
I was asked by a gardener what interspecific geranium is.  I notice some of the geranium’s tags had that on the description and also on some just zonal geranium.  I found articles to help explain both. 
The interspecific geranium like the famous Calliope geraniums and Champion geraniums, combines the qualities of its two parents, the ivy-leaved geranium or pelargonium and the zonal type. It is a bushy plant, 35 to 50 cm (14 to 20in) high, robust, vigorous, and with excellent resistance to diseases, bad weather, and drought, flowering from May until the first frost. The interspecific geranium forms sturdy stems like zonal geraniums or pelargoniums, but flexible like ivy-leaved ones. Very floriferous and with rapid growth, it offers vigorous vegetation and has peltate, circular leaves, often spotted with brown, slightly fleshy, and aromatic. The latest generation of interspecific geraniums, like the 'TwoinOne', offer single to double flowers in a wide range of colours, from white to red, purple, and pink. They can be planted in pots or in the ground, in spring after the last frost. They are not hardy and should be overwintered frost-free.
 
Zonal geraniums (Pelargonium x hortorum) are popular flowering plants known for their vibrant blooms, distinctive zoned foliage, and versatility in gardens and containers.  Zonal geraniums are upright, bushy plants with rounded, mid-green leaves that often feature a darker circular band, giving them their “zonal” name. They produce clusters of flowers in a wide range of colors, including red, pink, white, orange, lavender, coral, burgundy, and salmon. These plants can grow up to 1 meter tall, or even 3 meters against a wall under glass. They are native to South Africa and are technically Pelargoniums, not true geraniums.
Just for fun to let you know the difference.  Knowledge is good and it has power. 
Till next time this is Becky Litterer, Becky’s Greenhouse, Dougherty Iowa [email protected]  641-794-3337  cell 641-903-9365  Beckysgreenhouse.com  Facebook Becky Kerndt Litterer or Becky’s Greenhouse
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    Hi! My name is Becky and I am a Master Gardener. I own Becky's Greenhouse in Dougherty, Iowa.

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