Hibiscus forum: Fertilizer for tropicals

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Name: Alice
Saint Helena Island, SC (Zone 9a)
Charter ATP Member Orchids Fruit Growers Tropicals Hummingbirder Garden Photography
Container Gardener Butterflies Bromeliad Birds Ponds Region: South Carolina
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ardesia
Apr 7, 2018 4:32 PM CST
About 10 years ago I grew quite a few H. Rosa sinensis, I was even trialing them for a hybridizer. At that time the growers felt that, unlike other flowering plants, excess phosphorous was detrimental to good growth and flowering in tropical hibiscus. Yesterday I picked up a beautiful Tradewinds 'Mandarin Wind' and the tag with it said to fertilize with 5-10-5. Have the recommendations about phosphorous changed? What are you all feeding yours?
Thanks, alice
Minds are like parachutes; they work better when they are open.
Name: Jay
Nederland, Texas (Zone 9a)
Region: Texas Region: Gulf Coast Charter ATP Member I helped beta test the first seed swap I helped plan and beta test the plant database. I was one of the first 300 contributors to the plant database!
Celebrating Gardening: 2015 Plant Identifier Tip Photographer Garden Sages Garden Ideas: Master Level Hibiscus
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Horntoad
Apr 16, 2018 7:46 PM CST
Yes, phosphorus should be low for H. rosa-sinensis. According to Hidden Valley Hibiscus, you should have medium Nitrogen, low phosphorus, and high potassium. The fertilizer they sell is 17-5-24, so anything with a similar ration would be best. Personally, I have had pretty good success with Miracle Grow.
wildflowersoftexas.com
texasnatureonline.com


Name: Alice
Saint Helena Island, SC (Zone 9a)
Charter ATP Member Orchids Fruit Growers Tropicals Hummingbirder Garden Photography
Container Gardener Butterflies Bromeliad Birds Ponds Region: South Carolina
Image
ardesia
Apr 17, 2018 3:49 AM CST
Thanks Horntoad, that is what I remembered. We have an excess of phosphorus in our soils and water here, I didn't want to add to the problem.
Minds are like parachutes; they work better when they are open.

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