Hey! Da ich eher ein unerfahrener Gärtner bin, könnte ich etwas Hilfe gebrauchen. Ich habe in meinem Garten Anfang des Jahres eine Grenze angelegt und einige Bäume und Pflanzen darin gepflanzt. Dazu gehören 6 Thuja-Smaragd-Bäume (3 auf jeder Seite der italienischen Zypressen). Wie Sie sehen können, sind sie rötlich/braun geworden. Ich glaube nicht, dass sie tot sind, und ich habe bei der Inspektion der Zweige keine Anzeichen von Krankheit/Pilz festgestellt (keine Fäulnis/Flecken, die Zweige sind biegsam und wirken scheinbar „lebendig“).
Habe ich sie zu dicht nebeneinander gepflanzt? Habe ich sie zu flach/tief gepflanzt? Habe ich sie zu viel oder zu wenig gegossen? Sie begannen im Spätsommer während einer besonders heißen und trockenen Periode zum ersten Mal braun zu werden (ich konnte sie einige Wochen lang nicht gießen).
Alle meine anderen Pflanzen und Bäume scheinen zu gedeihen, daher glaube ich nicht, dass es ein Problem mit dem Boden ist.
Kann ich irgendetwas tun, damit sie wieder grün werden und gedeihen?
Danke!
Von: Hazardous_Hibiscus
6 Comments
No, I’m afraid all you do with those is dig them out,much too far gone to retrieve I’m afraid.
The likeliest reason is they went seriously short of water earlier on in the Dry Summer.
They are done I’m afraid, lack of deep watering during a hot spell while they were establishing. Brown won’t turn back to green, thuja is known for it.
I hate to be the bearer of bad news but those Thujas are totally cooked. When a conifer turns that shade of rust brown from top to bottom it is not playing dead, it is dead. The bendy branches are just retaining moisture in the wood while the foliage has already completely failed. Conifers are tricky because they have a lag time where they stay green for weeks after they have actually died from drought stress, so by the time you see the color change it is already too late to save them.
That hot dry spell you mentioned where watering stopped is definitely the culprit here. New transplants have a root system the size of a basketball and they cannot tap into ground moisture like established trees can. Thujas especially Emerald Greens are thirsty plants and missing a few weeks of water in their first summer is usually a death sentence. The fact that your other plants are thriving just means they are either more drought tolerant or had better root establishment, but Thujas are notoriously unforgiving about water inconsistency in year one.
You need to rip these out before they become a fire hazard. When you replant you have to commit to deep watering at least twice a week or run a simple soaker hose on a timer. I help people with these kinds of privacy screens all the time and I always tell them that automatic irrigation is cheaper than buying the same trees twice. Get some mulch down around the base of the next batch too because it looks like bare soil right now which lets water evaporate way too fast.
That close to a fence most large potted conifer will struggle as you’ve planted them in a raised bed so the drainage will be better than the surrounding soil. If the fence was causing a rain shadow then they were on a . Think about where the plants come from and you’ll get an idea of what they can cope with.
Italian cypress – mediterranean climate, likes dry spells and drought tolerant, not overly wet. Thuja – north america/canada, wetter colder climate with moisture, sometimes called swamp cedar.
Underwater 100%. I did a ton of planting this year the ground was the driest I’ve ever seen. They are dead as dodo. Shame cos smaragd are lovely trees
As an additional something to be aware of when you replace them, think about their width as well as their height. These thuja were planted far too close to the fence and then dying will have saved you years of ongoing problems with them growing into the fence panels and posts. Remember that a width of the plant is how big its diameter will be, not just the width across. So if you plant an evergreen tree with a 3m width at maturity you need to plant it 1.5m away from the fence. It will look odd to start with but you (and your neighbours) will be eternally grateful once they get going.