Roselle hibiscus, red sorrel, Jamaican sorrel, and Florida cranberry are a few of the many names for “Hibiscus sabdariffa”, which is a tasty and stunning addition to the garden. Although a perennial, roselle is usually grown as an annual.
Learn how to grow roselle hibiscus, and enjoy the season-long color, beautiful blooms, and red flavorful calyces it produces.
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8 Tips for How to Grow Roselle Hibiscus
1. Plant roselle at the right time
- Roselle germinates at soil temperatures between 75°- 85°F, and does well directly sown in the garden.
- Plant 2-3 seeds 1/2 inch deep and about 3 feet apart. When seedlings are 2-3 inches tall thin to the strongest seedling.
- In the low desert of Arizona, plant roselle from seed or transplants once temperatures warm up in March through the end of May. (Start seeds indoors from February – April.)
- In cooler climates, start roselle from seed indoors 6-8 weeks before the last frost. When seedlings are 3-4 inches high, transplant them into a spot in the garden with full sun.
2. Plant roselle in the best location
Roselle prefers well-draining fertile soil. Overly rich soil or extra fertilization leads to a very large plant with fewer calyces. A sunny spot is best for growing roselle successfully. In the low-desert of Arizona, some afternoon shade is fine.
3. Give roselle plenty of moisture
Roselle hibiscus prefers humid, warm conditions and does not tolerate frost. It is grown as a short-lived perennial in zones 10 and 11, and as an annual in cooler zones.
In the low desert of Arizona, the roselle plant begins to thrive when the more humid monsoon weather begins. Keep the soil evenly moist as roselle grows. Take care not to overwater as roselle can be affected by root rot if the soil is not well-draining.
4. Give roselle hibiscus room and support to grow
A roselle plant is very large and needs plenty of room. Space plants 3-6 feet apart in rows at least 5 feet apart. One or two good-sized plants may be all you need for a bountiful harvest of the beautiful calyces. Provide support for roselle hibiscus. I normally use a length of rebar pounded into the ground (about a foot) as a support. The branches can get very heavy, especially after a rain or once branches are loaded with blooms and calyces.
5. Understand that roselle is day-length sensitive
What does that mean? When a plant is “day-length sensitive”, the light cycle affects when the plant will bloom. The stunning blooms (similar to okra blooms) are triggered as the days get shorter in the fall.
Although the plants don’t bloom until fall, planting roselle earlier in the season ensures a large plant with plenty of blooms and calyces to harvest. Roselle planted in August would (probably) still bloom, but the resulting plant and harvests would be much smaller.
6. Harvest roselle calyces at the right time
- After the beautiful roselle bloom fades, the flower withers and falls off.
- Between 7-10 days after blooming is the best time to pick the calyces.
- It is time to harvest when the pointy red calyx around the seed pod is just over an inch wide. The seed pod is fully grown but still tender.
- • To avoid damage to the branch it’s best to remove the calyx with clippers.
- Harvesting roselle calyces early and often increases the overall yield of the plant.
7. Use roselle hibiscus in several ways
The flavor of the roselle calyx is similar to cranberry, but less bitter with lemon undertones. To use the calyces, cut open the calyx, remove the white seed capsule, and rinse before using.
Use the calyces to make jellies, juice, tea, pies, and even this recipe for “mock” cranberry sauce for Thanksgiving.
One of the most popular uses, especially in Jamaica, is as a seasonal drink, “Rosa de Jamaica” at Christmas time in Mexico, Central America and the Caribbean. In Mexico and in Mexican restaurants in the United States, the beverage is known simply as “Jamaica”.
The blooms, leaves, and pods of roselle hibiscus are also edible. The leaves taste like spicy spinach, and are used in many cultures around the world. Use the leaves in salads, cooked greens, tea, and jams. Both the leaves and calyces contain natural pectin.
Looking for recipes to use roselle hibiscus? In this article I share my 5 favorite.
8. Save seeds to plant and share with others
Leave a few calyces on the plant to harvest the seeds at the end of the season. To harvest roselle seeds, allow the pods to stay on the plant until the seeds inside have dried and turned brown. When the seed pods dry, they will crack open easily. Shake out the seeds, and store them in a dark, cool location.
Thursday 4th of May 2023
I'm planting my first roselle this afternoon. (Phoenix) If I were to try to keep this as a perennial, how would I overwinter it?
Saturday 6th of May 2023
@Angela Judd, My packet says to plant 8-12” apart rather than 4x4 space. It is the zinger Hibiscus. Is that just a different variety?
Friday 5th of May 2023
I have yet to have mine overwinter successfully - put it in your warmest location and hope for the best.
R J Hunter
Saturday 15th of April 2023
I would Love to grow these! Any advice for growing in NE Ohio?
Tuesday 18th of April 2023
Start seeds indoors for sure, and choose the warmest/sunniest spot in your yard.
Saturday 21st of January 2023
Oh, please disregard. I found your link to Renee's Garden. Thank you!
Saturday 21st of January 2023
Where do you purchase the seeds, Angela, please. Thank you.
Thursday 15th of December 2022
I'm here in central west Florida and this is my first year of having a thai red rozelle covered with calyces. The plant is about five feet tall and maybe four feet wide. Each of the calyces is about an inch long and maybe 3/4 inch wide and a burgundy red. Some are even about 1/5 inch long and one inch wide. I read that the calyces should be picked before they get brown, but I haven't seen any white flowers. I read that you don't pick them until the white flower dies. I would think that they would be blooming by now. I have seen pictures of bowls of calyces that were picked and getting ready to make jam and they looked just like mine, but I haven't seen blooms. Do I pick them now before they bloom? If I wait much longer they may turn brown. Or must I wait until I see a bloom and the bloom falls off before I pick them? If I do wait until then, then what I pick won't look like the ones that someone showed in a picture that they picked in order to make jam. I'm confused.
Friday 16th of December 2022
Hi Diana - sounds like they have already bloomed and are ready to pick. The blooms may not have been noticeable.