- Location
- Owaka, New Zealand
One thing that spreading/californian/creeping thistle DOES NOT ENJOY is when you pull a subsoiler through them and cut up their rhizome
Don't imagine the aerator will have quite the depth for that - thistles mainly survive so well simply because of lack of anything with deep roots, so they have a source of moisture and nutrition that most other species we sow just can't reach - so they grow in any and all conditions as a result.
I will save you reading yet another "abandon monoculture" speech - but I will add that chicory is about as close to thistle as possible, and will outcompete them for resources reasonably quickly if they are able - but reducing compaction will help other species also compete with the thistle/ragwort type weeds of the world.
It is a lack of depth that is the issue (I'm sure you know what I mean without spelling it out) that causes the problem, masking the symptoms is only effective while you keep 'doing' - nature loves filling an empty niche
May still be a bit damp to relieve compaction without simply causing deeper compaction, ideally the ground should be "hard" so that the soil strata "shatters" with the lateral forces applied by the spikes.
They still do a job in the wetter soil but they will do a better job the drier it is (provided it still goes in to depth, and you aren't in a drought, they do stress things a bit)
Don't imagine the aerator will have quite the depth for that - thistles mainly survive so well simply because of lack of anything with deep roots, so they have a source of moisture and nutrition that most other species we sow just can't reach - so they grow in any and all conditions as a result.
I will save you reading yet another "abandon monoculture" speech - but I will add that chicory is about as close to thistle as possible, and will outcompete them for resources reasonably quickly if they are able - but reducing compaction will help other species also compete with the thistle/ragwort type weeds of the world.
It is a lack of depth that is the issue (I'm sure you know what I mean without spelling it out) that causes the problem, masking the symptoms is only effective while you keep 'doing' - nature loves filling an empty niche
May still be a bit damp to relieve compaction without simply causing deeper compaction, ideally the ground should be "hard" so that the soil strata "shatters" with the lateral forces applied by the spikes.
They still do a job in the wetter soil but they will do a better job the drier it is (provided it still goes in to depth, and you aren't in a drought, they do stress things a bit)
Last edited: