Growing Rosella, also Queensland Jam Plant, Roselle

Jan F M A M J J A S O N Dec

Not recommended for growing in USA - Zone 5a regions

  • Sow in garden, or start in seed trays. Sow seed at a depth approximately three times the diameter of the seed. Best planted at soil temperatures between 68°F and 95°F. (Show °C/cm)
  • Space plants: 55 inches apart
  • Harvest in 21-25 weeks.
  • Compatible with (can grow beside): Feverfew, Coriander, Nasturtium and Hyssop
  • Rosella bud

This frost tender annual grows to a height of 2 metres. It is grown for its red fruit which make delicious jam or jelly.

Rosella needs a growing season of at least 6 months warm weather so is best suited to tropical or sub-tropical areas. Can be started under glass in cooler areas. Water well and give a dressing of fertiliser when flowering starts.

Culinary hints - cooking and eating Rosella

The large flowers produce a crimson enlarged calyx.
Use the fleshy red calyx, without the green seed pod to make jam or jelly.

Your comments and tips

25 Mar 20, Lyn (Australia - sub-tropical climate)
I have rosellas growing and all looking lush.. BUT some of the stems are droopy and bent right toward the tip..looks like something may have twisted it.. any idea what is causing this and how to treat it. Thank you.
28 Mar 20, Clive (Australia - temperate climate)
Also check for grasshoppers. I had the same broken stems on my rosellas. Noticed a few of green grasshoppers. Sprayed them. Now no grasshoppers and no broken stems. Coincidence????
27 Mar 20, Kathryn (Australia - sub-tropical climate)
My rosellas are also looking great - flowering and setting fruit but I did notice the same thing this week and upon closer observation there were green caterpillars on the leaves. I gave them to the chooks :)
26 Mar 20, Anon (Australia - temperate climate)
With a lush plant I would say you are over watering and fertilising them. The stems are growing growing and become thinish and weak. Back off the watering and fert and let the plants tuffin up a bit. Otherwise you may have some disease. Last time I saw rosella plants was nearly 60 years ago.
22 Mar 20, Linda Bowden (Australia - temperate climate)
Why is my Rosela bush not flowering. Its huge in size, about 7ft tall. But no blooms.... help
28 Mar 20, Clive (Australia - temperate climate)
I was in the same boat. Big plants but no flowers. Now i have fruit everywhere and around 50-60 flowers everyday. Central QLD. Seamed a few weeks ago when the temps dropped a little they started to flower. These are bushes i grew from my own seeds from last season. I have another 4 bushes grown from seeds i bought from Ebay. 2 of these bushes have only just started signs of fruit in the last 2 days. Yours may flower real soon, depends on your climate/temperatures. I made a jar of rosella jam yesterday. Looks like another 100 jars coming up lol
27 Jun 20, Anne (Australia - sub-tropical climate)
In rocky When should we plant rosella seeds
24 Mar 20, Frank (Australia - sub-tropical climate)
You may have too much nitrogen in the soil so leaf growths is excessive at the expense of flowers? Add some potassium
24 Mar 20, Another gardener (Australia - sub-tropical climate)
You may have over fertilised it or grown it out of season. Plants will grow and grow until nutrient starts to run out and then they will go to seed to reproduce themselves.
07 Mar 20, Bongani (South Africa - Summer rainfall climate)
Can one grow rosella aquaponically and how large do the plants get?
Showing 1 - 10 of 410 comments

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This planting guide is a general reference intended for home gardeners. We recommend that you take into account your local conditions in making planting decisions. Gardenate is not a farming or commercial advisory service. For specific advice, please contact your local plant suppliers, gardening groups, or agricultural department. The information on this site is presented in good faith, but we take no responsibility as to the accuracy of the information provided.
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