After the last average frost date in your area, prune away damaged twigs on your gardenia. If you live in a cool region, then an option is to grow your gardenia indoors to prevent frost damage.
Inadequate or excessive moisture can cause gardenia buds to drop before they open. Water the plant's soil when the top 1 inch of the soil feels dry to the touch; keep the soil evenly moist, and spread a 3-inch-thick layer of mulch on the soil to retain moisture.
If you have an indoor gardenia, then run a humidifier in its room, or place the plant's container on top of pebbles in a tray of water; the water shouldn't touch the top of the pebbles. Gardenia fertilizer should be one designed for acid-loving plants, which will promote continuous gardenia blooms, according to the Univ ersity of Hawaii Cooperative Extension.
Dilute 1 tablespoon of water-soluble fertilizer in 1 gallon of water for an outdoor gardenia, and use the diluted solution to water the plant once every one to two weeks during spring and summer. The number of hours of light and darkness the gardenia receives can affect its blooming. Gardenias are short-day plants, which means they form buds when there are 10 to 12 hours of light and 12 to 14 hours of continuous darkness per hour cycle. Artificial light during winter may prevent an indoor gardenia from producing flower buds.
Heavy shade may prevent blooming during the spring and summer blooming season. Not enough humidity for indoor plants: Try using a humidifier in the room where you keep your gardenias. Not enough sunlight: Gardenias need at least eight hours of full sunlight each day.
Pests: Check your plants for pests underneath the leaves, in the soil, and on the stems. The type of pest will determine which pesticide you will use. Spider mites commonly cause brown spots, and they can be treated with Neem.
Improper pH: Check your soil pH, which should be 5. Add MirAcid if necessary. No Blooms A gardenia that doesn't bloom is a real disappointment. Hard Blooms That Won't Open One of the most frustrating problems a gardenia lover can encounter is having a plant with plenty of buds, but they are hard, won't open, and may even turn yellow.
To correct this problem: Check the soil pH and add MirAcid if necessary. Follow the package directions carefully. Temperature is very important for blooming. If it is too cold outdoors, your plants may not bloom properly. Indoor plants need a room with constant humidity and warm temperatures. Drainage is also important. A wet plant is an unhappy plant, so be sure your plant is moist but not soaking wet.
Bloom Drop Bloom drop is very disappointing for gardenia owners. Problematic Pests Spider mites Pests are a constant issue, even if you keep your gardenia indoors. The most common pests for gardenias are: Spider mites: Put a piece of white paper under several leaves and shake the leaves gently. Fold the piece of paper in half and make sure you firmly flatten the crease. Open the paper up; if you see small red smudges, you have mites. Treat your plant with Neem.
Aphids : Spray the plant with a soap spray. Scale: The small, black-headed females do not have wings; the males have wings. Treated the plant with horticultural oil. Root nematodes: Above ground, the plant will have wilted and yellowing leaves, despite receiving the correct moisture and watering.
There are no pesticides for nematodes. This should occur after flowering in summer, but before the plant has time to set new buds. If you prune your Gardenia too late in the season, you will remove buds in the process of developing for the next season. Be careful - Some Gardenia varieties bloom twice in a season. Check what type of Gardenia you have before starting your pruning exercise.
Bud drop : If your Gardenia's flower buds fall off just before they open, this may be caused by pest infestation aphids, nematodes , excessive fertilization, over-watering, under-watering, poor soil drainage, insufficient light, unusually cool weather, rapid drops in temperature or very hot, dry weather.
Flower buds will fail to form if the ideal temperature for Gardenias is not respected! Nutrient deficiencies : Gardenias like soil that is rich in nutrients. Add plenty of organic matter to the soil such as peat moss or manure to enhance the growth of your plant.
Fertilize Gardenias every weeks during their growing season March to October with a dilute fertilizer for acid-loving plants. Do not fertilize from November to February. Poor soil drainage : Make sure your Gardenia soil is moist and well-drained. Inadequate Ph : Gardenias prefer acidic soils with a pH between 5. Pests and microbial threats : Aphids, scales and spider mites can attack gardenias. Check your plant for pests underneath the leaves and on the stems. Spraying your gardenia with an antifungal agent such as horticultural oil with baking soda and insecticidal soap can reduce the risk of infection or infestation.
Gardenias are not the easiest shrubs to grow, but their exquisite fragrant flowers make up for the extra attention they require Learn More. If your Gardenia's flower buds fall off just before they open, this may be caused by any of these reasons Learn More.
Gardenia Leaves Turning Brown. If your Gardenia's leaves turn brown or display brown spots, this may be caused by any of these reasons Learn More. Gardenia Leaves Turning Yellow. If your Gardenia's leaves turn yellow and drop, aside from the normal aging process of its leaves, this may be caused by any of these reasons Learn More. Favorite Large Gardenia Varieties. Favorite Medium-Sized Gardenia Varieties.
Hardy Gardenia Varieties. Heat Zones 8 - 12 What's My Zone?
0コメント