Be a turner, not a weeder....
Frank Kobilsek said:
Jim & Rob,
I use the walnut under the honeysuckle hedge I have. Slowing growth of that mess is a good thing. Everything else goes on the garden.
Rob as our resident botinist (Spelling, sorry) would the walnut be OK on the asparagus patch? I've lost control in there the last couple years to grass and some strange smooth thisel like weed.
Frank
Frank:
I routinely put walnut shavings in sidewalk and driveway cracks in the cement and rarely have a weed grow there from seed....glad to know that it is working under the honeysuckle.
You asked about using walnut shavings on the asparagus patch..... the compound probably is not too selective and will effect plants differently. The allelopathic chemicals (such as the juglone from walnut tissue) function most efficiently during the germination process, so this is why competition from tree seeds of other species is reduced under walnut trees. This also explains why the bulbils from the garlic/onion mentioned earlier seem to grow very well despite the presence of walnut shavings....these are
vegetative propagations, and not seedlings. Competition is reduced for these young garlic clones, so they grow, ....well....., like weeds....
If the asparagus patch is really that overtaken by weeds, I would suggest a more aggressive management practice than using walnut shavings. If it were mine, I would allow the asparagus to continue to grow in the company of its 'invaders' until mid-summer to allow the asparagus plants to store as much starch as they can for the over-winter period and for next Spring's growth. I would then carefully remove ALL of the aboveground asparagus leaves (the "fern-like" fine leaves and any other above-ground parts of these plants) cutting these back to soil line, but
leave the undesirable weeds intact. I would then spray the entire patch with a contact herbicide, such as Round-up (tm) [glyphosate] at least twice at several week intervals (to kill re-sprouts and new seedlings), making sure the application is done while the ambient temperature is within the effective range (i.e. usually above 50^F and below 90^F). It may also be helpful to add a "spreader-sticker" or other surfactant to be sure of good coverage and contact with all undesired plant leaves/stems. It is important that you follow up next spring by applying a pre-emergent germination-suppressing chemical [e.g. trifluralin, or something like Preen(tm)] to the soil to allow only the desired growth of the asparagus stems in the spring, and to stop germination of weed seeds. From there, careful control at appropriate times should keep your asparagus bed productive for many years. (Hopefully you have super-male cultivars.)
I doubt walnut shavings would touch these readily established (tenacious) weeds, and could possibly stunt the growth of your desirable asparagus plants. Sorry for the off-topic gardening diversion which has little to do with woodturning, other than having well-nourished, happy woodturners out there who should be turning rather than weeding overgrown asparagus patches!
Rob Wallace