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I have an indoor gardenia that I can't get to bloom. I have read that pruning at the end of the season helps, but I'm not sure how to do it or when. The plant is in good health generally.
I've had it for three years and it's gotten very tall, but it hasn't bloomed since I first got it. It's also getting very leggy. The only other issue I have with it is periodic pest issues. The pests I see usually look like fruit flies and go away with soap pest treatment.
Thank you for your help!
Hardiness Zone: 7a
By FeBe from New York, NY
This might sound off the wall, but it works like you would not believe. I have had a Gardenia plant know for 11 years. The first 9 years it would bloom and it would grow about an inch a year. I would fertilize it and water it faithfully. It had maybe 20 or thirty blooms on it and the blooms would turn and fall off after a couple of days. Then by accident I watered it with Urine. You can not believe what happened in a few days. The plant looked a lot better and started to grow, I mean grow. The Gardenia bush has grown over 1 1/2 feet in about 6 months. When it started to bloom .I had blossoms that where as big as a tennis ball and I counted them. The Gardenia bush produced 130 blossoms over one month. i can hardly wait till it blooms next year. I had taken pictures of the Gardenia in full bloom, but my computer crashed and I lost all my pictures. I will post the pictures in 2011 when it blossoms again. Just for information purposes. Urine is very acidity and Gardenia plants love it a lot. You do not have to buy plant food for the Gardenia. Try it. You will love the results.
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Hardiness Zone: 7a
Elaine from Charlottesville, VA
Gardenias are notoriously fussy. Creating the perfect conditions can be challenging, but it's worth the effort once those lovely blooms appear. Temperature, humidity and light are the three most critical factors in getting your gardenia to bloom. In order for it to produce buds, the plant needs cooler nighttime temperatures-preferably 60-65ºF and daytime temperatures not exceeding 70ºF. Keeping them in temperatures outside of this range can prevent them from flowering. This can be a bit tricky, especially in the summer. Gardenias require a fair amount of humidity, full sun and like soil that is kept consistently moist (but not wet). If you can, mist yours daily with a spray bottle. Gardenias also like their soil on the acidic side (pH between 5.0-6.0), so you might want to switch to an acidic fertilizer like those designed for azaleas or rhododendrons (used it half strength).
If you can create these conditions consistently throughout the growing season you should start to see some blooms.
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We live in Jalisco, Mexico and I was given a dying gardenia about 4 years ago.
We planted it in our flower garden and every 3 or 4 months, I put used coffee grounds that I save around the base of the plant. It is gorgeous. Blooms at least 3 times a year and I have gotten 4 other gardenias from this one and am going for 5 and 6 this spring.
For us, direct, all day sunshine and the coffee grounds are all we have had to do.
Bonnie Jene (10/22/2005)
I agree with the all day sunshine thought. Ours are taller then our chain link fence and get bigger every year. We are in the southern states so it gets really hot during the summer. Ours bloom around Mother's Day and keep blooming until around the end of May. I would go ahead and plant it and if you really want to smell the blooms, plant it under a window. That way when they are blooming all you have to do is open that window. (07/18/2006)
Gardenias should be planted in well conditioned soil containing peat moss and compost. Cultivating around the plants may damage their shallow roots, so the plant should be mulched with 2 to 3 inches of wood chips, sawdust, or ground bark to keep the soil moist, cool, and weed free. Feed the plants every three weeks during the growing season with a rhododendron-azalea food, or acidifying fertilizer. (Miracid)
Proper temperatures are necessary for a gardenia to bloom. This is the most critical aspect. Flower buds will fail to form if day temperatures are higher than 70 degrees or night temperatures are over 65 degrees or less than 60 degrees. The ideal temperature ranges would be 65 to 70 degrees during the day and 60 to 62 degrees at night.
Gardenias can be pruned as far back as you like, but you should keep a few important details in mind. First, cut plants back when they are dormant (depending upon where you live). This will allow the stems to "heal their wounds" when the plants aren't actively growing. This way you can still enjoy flowers the next year. When pruning, don't cut all the leaves off. Some leaves need to be left so the plant can still produce food for the root system.
The following spring, use an acidic fertilizer with chealeted iron and high nitrogen so the plant can produce healthy leaves and buds. If you only want your plant to become bushier, simply pinch out the tips while the plant is dormant. Pinching will usually promote a heavier bloom the following year.
If you are growing your gardenia as a potted plant indoors, keep it out of direct, hot sun, and allow it to only get bright light.
Hardiness Zone: 7b
Judy from Portland, OR
Gardenias can have problems with blossom drop, especially when grown indoors. Besides too little light and humidity (which doesn't sound like the problem with yours) flower buds can drop from over OR under watering, high temperatures or improper pruning (on outdoor plants). Gardenias also need acidic soil and can benefit from a good azalea fertilizer once per month during the summer. Azalea fertilizer contains sulfur, which helps acidify the soil.
For indoor gardenias, place your plant where it will get plenty of light during spring and fall bloom times. Nighttime temperatures should be about 55°F. Make sure the soil stays lightly moist (not wet) and keep the air around the plant humid.
If your gardenia is kept outdoors, prune it only to keep the shape of the plant and do it immediately after the plant finishes blooming.