We planted a thuja hedge last September. Until now, it looked really healthy. However, more and more plants are turning brown over time. The brown plants are very easy to pull out. It seems like the roots haven’t taken hold at all. What could be the reason for this? Especially since the plants were previously quite green and had grown well.
H
hampshire28 Jun 2021 15:32Nadini89 schrieb:
It’s not about whether it’s Thuja, but about how we can save it.Were you able to identify fungi, aphids, waterlogging, or something else as the cause? Do you already have a plan?hampshire schrieb:
Were you able to identify fungi, aphids, waterlogging, or something else as the cause? Do you already have a strategy?So it probably isn’t fungi. I believe there are already some aphids on certain arborvitae... but if I’m seeing this correctly, they are common aphids... and those normally don’t kill arborvitae, right...? We don’t have a strategy yet... How can I tell for sure if it’s waterlogging?
if the roots look rotten and the soil is still wet before pouring. Not on the surface, but in the root zone.
Often the roots and the surrounding area also smell rotten.
Aphids do not destroy the plants themselves; they weaken them.
Ants usually come along with these pests. I have had an extreme number of aphids this year.
Do you have acidic or sandy soil?
Did you properly backfill the soil around the thuja plants when planting?
Have they been under-watered or watered too little?
Over-fertilized or incorrectly fertilized? Was fresh compost or horse manure used, or was it incorporated without weighing, just by feel?
Often the roots and the surrounding area also smell rotten.
Aphids do not destroy the plants themselves; they weaken them.
Ants usually come along with these pests. I have had an extreme number of aphids this year.
Do you have acidic or sandy soil?
Did you properly backfill the soil around the thuja plants when planting?
Have they been under-watered or watered too little?
Over-fertilized or incorrectly fertilized? Was fresh compost or horse manure used, or was it incorporated without weighing, just by feel?