The Content Of The Article:
- Bamboo in the garden
- Pests and diseases
- Yellow leaves and brown spikes at the bamboo in the tub
Yellow leaves and brown spikes on bamboo are no reason to panic, they can even have different natural causes. Otherwise, there is a little work to correct care mistakes, pests, fight diseases, in the winter to save to very freezing bamboo, but that's what you get, and soon your bamboo is all around again green:
Bamboo in the gardenThere are several reasons for a bamboo to develop yellow leaves and brown tips:
1. Little misunderstanding?Maybe your bamboo will develop yellow leaves because it was bred to do just that. There are some bamboo cultivars that are supposed to shine in yellow (mostly gold in the sales description):
- Fargesia murielae 'Deep Forest', characteristic feature of the cultivar are reddish shoot tips
- Fargesia murielae Green Arrows, makes bright green youngsters, older stalks are to yellow
- Fargesia denudata 'Lancaster 1', Waterfall bamboo that shoots out green bamboo stalks that will take on a unique, yellow glow in the sun...
- Fargesia murielae Standing Stone should also wear yellow stalks in old age
- The new Hibanobambusa tranquillans, a hybrid of Phyllostachys nigra 'Henonis' and 'Sasa', there are in green and variegated
- The popular one Hibanobambusa tranquillans 'Shiroshima' belongs to the variegated forms with green-cream-colored leaves
- Pleioblastus viridistiatus should be "yellower than any other bamboo"
- Both Pleioblastus There are other bamboos with yellow, green, yellow-green and white-green leaves
Other bamboo species also turn their leaves yellow in the fall, although they are actually evergreen. It is also normal for evergreen plants that fall in the cold time a few leaves. After all, the leaves of an evergreen plant do not live forever, but die after a different lifetime, and it is most effective for the plant to dispose of these leaves at the end of their lifetime when they least need them, that is, in winter.
Some bamboos carry a lot of leaves, the better they are, the more, you can enjoy such bamboos with a similar autumnal golden yellow leaf coloration as a native deciduous tree. Of course, you will enjoy it only if you know that the golden yellow leaves are normal, besides information about the bamboo species, a fresh green bamboo after the first autumn storm (including flattened leaves on the ground) is a sure indication of natural leaf discoloration.
2. Too cold?
The world is big today, and the trading world is much bigger, so all sorts of bamboos are sold.
Surely you have already heard that many of the approximately 1,500 species of bamboo like to send foothills through the garden, which can not always be kept well even with rhizome barrier. Surely you have informed yourself, so you do not catch one of these bamboos with leptomorphic rhizomes, or a very deep rhizome barrier dug into the garden floor.
What you may not have been aware of is the winter hardiness of the bamboo - perhaps you, like any normal-minded person, assumed that only plants that survive the winter in the German garden will be sold for planting in the German garden.
You have thought of it as a human being, but not as a "homo oeconomicus" (the rational economist invented by economists who is trying to take over world domination). Homo oeconomicus is not supposed to describe a purely egotistical person, but only a reasoned person who clearly arranges all important aspects before a decision - but if "profit" is the most important aspect for the trader, it affects this utility maximizer only peripherally, whether his product also uses the buyer to sell the main thing.
A short search for bamboo species currently offered for German gardens brought the following offers:
- Chusquea, in several species, but home is in the tropics and subtropics
- Dendrocalamus gigantea, Giant bamboo, comes from tropical regions of Asia, is about 40 m high
- Dendrocalamus strictus, Black Giant Bamboo, s. o., only smaller
- Fargesia murielae 'Super Jumbo', is said to be hardy to -25° C, but is usually bred in Denmark, where it is warmer than ours
- Also F. murielae 'Dino', 'Hutu', 'Jutu' and 'Mammoth' usually come from Denmark and are not sure of being frost hardy here
- Fargesia robusta Campbell, hedge bamboo, is said to be hardy only in warmer regions of Germany and freeze completely in colder regions without good winter protection
- Hibanobambusa tranquillans 'Shiroshima', can not wait more than -17° C, with us it can get colder
- Phyllostachys bambusoides, hardy between -14 and -20° C, only for warm and mild climates
- Phyllostachys nigra, black bamboo, depending on the species hardy between -16 / -20 / -25° C, v. a. grows in warmer locations and sufficiently hardy
- Phyllostachys pubescens, Moso bamboo, winter hardiness -16° to -21° C, only well-rooted stocks in warmer regions should be very hardy
- Phyllostachys viridis glaucescens, should be really hardy only in warmer and mild regions of southern Germany
- Sasa are recommended except for Sasa tsuboiana (USDA 5) from USDA hardiness zone 6, in Germany it goes down to 5b
- Semiarundinaria fastuosa, also variety 'Viridis', USDA hardiness zone 6b to 10
3. Care errorIf your bamboo should only have green leaves and the discoloration is certainly not due to too much winter cold, then care deficiencies could be the cause:
- Wrong location? A Fargesia murielae needs z. B. at least 1.5 m² for themselves and a little free space around them
- If squeezed into a group plantation, he may feel so crowded by the neighbors that individual leaves are deficiently cared for
- The bamboo or other plants next to it should then be implemented
- Too much (burning noon) sun, too much shade? Both can have fatal consequences depending on the type of bamboo, some bamboos even disturb too much sun on the roots
- Read again site claims of the kind, plant protection or shading away or implement
- Too much moisture (wet feet = waterlogging), too little water? Most bamboos suffer from waterlogging, but need slightly damp roots throughout
- Maybe you put the bamboo in a tight vessel as a rhizome barrier, which needs a lot of holes and a tight wire wrap
- Otherwise make ev. Soil by mixing in sand permeable or simply pour more (in heat)
- Or in the cold, the evergreen bamboo needs some water on frost-free days even in winter
- A single heavy surge of highly concentrated liquid fertilizer may cause discoloration after some time
- Too little nutrients are gradually noticeable
- In both cases check fertilization and adjust (do not fertilize in winter)
- Some bamboo species feel better in fresh coastal regions in the long term than in the warm south of Germany
- In vineyard climate, they grow very fast, with many soft young stems that are sometimes pulled to the ground and then maybe yellow
- If a bamboo is not wind-protected enough, a storm can bend the supply lines
- In both cases, plant shading or wind protection next to it or install it artificially
- A newly planted bamboo sometimes turns its leaves brown, apparently without cause
- This is called plant shock and should be remedied by abundant watering
Pests and diseases
Pests and diseases are rarely seen in robust bamboo plants, but of course (perhaps caused by care mistakes or freezing in winter) may also be to blame for yellow leaves and / or brown tips:
- Bamboo, like any other plant, can be attacked by wool lice
- They like to hide under the sheaths of the bamboo plants
- The Fargesien are particularly frequently attacked
- From the beginning of March, aphids begin to suck on bamboo plants
- All this can cause deformed, yellow, brown leaves
- With the lice, black smoke fungi can migrate, with the result of more serious damage that young bamboo plants can succumb to
- If you notice sticky deposits on the leaves, the bamboo should be showered in horsetail broth or aphid killers
- Affected leaves should be collected
- Corn rust fungi can also attack bamboo and cause brown-orange spots on the leaves
- In front of all too tight and in high humidity bamboo standing, so create space and air
- If the discolored leaves were dropped, this spook is usually over
- The leaves should be removed and disposed of
- You may also have bought in the Asian bamboo mite, which has migrated with bamboo imports from China
- She especially likes hard-leaved bamboo species, Phyllostachys, for example
- In extremely dry weather, gall mites could also spread
- Particularly vulnerable are bamboo plants in the tub, dense bamboo hedges and bamboos that sit in a too dry rhizome barrier
- Mites can be recognized by bright, narrow spots spreading to the top of the leaves
- On the undersides of the leaves sit spangles; Remove affected leaves and stalks and burn them or treat them with stinging nettle, potash soap, acaricide
- Prevention: Bamboo shower often, rather pour abundant and possibly provide for higher humidity
- White flies (Phyllostachys) and fringed flies (thrips) appear in May and set their eggs partly directly into the plant tissue
- Sucking causes silvery-bright discolorations on the leaf tops
- Thrips and larvae produce black stains on the undersides of the leaves
- Because they can not tolerate moisture, you can expel them by showering the bamboo for a few days a day
- Prevention: Blue glue boards, yellow do not work here
- All of these animals have less chance from the start if you maintain the natural insect police by cultivating the garden close to nature
- Ants, lacewings, ground beetles, ladybirds, predatory mites, hoverflies, spiders and wasps: each of these creatures keeps watch over certain other species
Yellow leaves and brown spikes at the bamboo in the tubAll of the situations and influences just described can also put a bamboo in the bucket, just a little faster or more than a bamboo in the garden. The attitude "in prison" is only a "second choice" for a plant, and it is more difficult to create optimal living conditions for the plant.
Therefore, something goes wrong faster, even the short-term clogged water drain of the bucket bathes the bamboo in waterlogging and can thus clean the roots harm. So with each pouring make sure that the procedure is free. A balanced supply of nutrients is also more difficult to achieve: nutrient deficiency (iron, magnesium, nitrogen), but also over-fertilization / salinisation of the soil can cause chlorosis. So calculate fertilizers exactly or exchange the soil in case of probable over-fertilization.
Speaking of earth exchange: potting soil is usually pre-fertilized, and newly purchased bamboo plants usually have to be fertilized only after one year, because they were supplied by the grower / dealer with all the important nutrients. If a bamboo grows well, it can consolidate at some point, then it must be thinned by trimming, transplanted or shared. Otherwise, the yellow leaves or brown tips can be cut away at the latest in the spring before the new shoot, then calm the whole stalk to the ground. The more air the bamboo has to re-emerge.
ConclusionYellow leaves and brown tips on a bamboo can have all sorts of causes, but you do not need to grow gray hair. Maybe it's just the nature that turns the bamboo leaves yellow, otherwise you just have to correct the care mistakes or dam the pests / diseases, so that the next leaves drift again beautiful green.