Late Autumn into early winter the weeds and grasses are coming thick and fast. In my newer patches, especially, it's soursob, the weedy oxalis, which is one of the worst for me ( I suspect some of it may have come through the hot compost so no more of it to go in to the compost - the stuff tastes acidy and 'orrible anyway and even the guineas won't eat it). We all have different situations and what I recount below worked or seems to be working for me but may not be the best or appropriate for others.
For me ... once the last of the pumpkins and summer tomatoes etc are cleaned out I want to get out as much of the oxalis as reasonably possible in the shortest time. I normally control weeds by scraping the loose and friable top layer with the dutch hoe (another advantage using compost and having biolgically rich soil is it's easy weed friability). But Oxalis will just come back. from it's root bulbs. (and numerous bulbets once maturing).
In my main beds I don't have much mulch layer because last summer I was having so much trouble with earwigs, slaters, slugs, etc eating so much of my strawberries, greens, early tomatoes, etc I raked out all the straw mulch and loose stuff on the surface because that's where they were all hiding out during the day. I had put a good layer of compost over the beds and planted pretty densely. I decided to top water with fixed pole twirly sprinklers daily (tank). I'll do that again. It worked better for me and stuff like pumpkins and tomatoes have a broad surface root system and I think this is why drip watering with these sorto plants was no good.
In the past I've tried mulching, covering with newspaper, etc, but the oxalis is persistent
This year I'm in the process of ploughing up between the remaining perennial and new vegies and brambles, etc with the gardeners mattock (about $50 at Faggs I think). (Sorry for offending the "no-dig" faction). I fork and rake out the green clumpy stuff and I'm piling up the oxalis where I can destroy en masse. (I've found and recommend the Fiskar's mulching / compost fork ($50 at Buninngs) to be a great aid.. also for picking up and handling prickly and messy stuff.
Next.. stage... compost all over the shop.
I think I'll also put a light layer of barley straw mulch over all the weeded areas except where I'm growing a green mulch for (hopefully, this year, summer vegie killer bed). So, things gone full circle for me.. no mulch in summer, bu mulch light in winter, (but big on compost).
I feel pretty chuffed cuz I bought my first big round of straw from Woolabrai farm supply shop in the main street of Meredith for $22. But that's another story...Where I wanted to put it near my chook areas meant I took it off the trailer on a slope. Well the thing rolled off the trailer ok but then dropped and the bloody thing sort of "bounced", gained a lot of momentum, brushed me aside, knocked me to the ground, squashed my mobile with the song mp3's on it.... and took off like a crazy steam roller, like the french farmer who took a dozer to McDonalds, before crashing into the chook fence. Pam Bolton's "Little Johnny" went flapping off in great indigantaion as part of agreat chookly uproar. Ruby, the border collie, thought it was a great lark and added to the general mellee. Meanwhile, I was on the ground, winded, ...and as the general caucophany died down I noticed my squashed mobile had randomized the MP3 song selection on to Bob Dylan's "Like A Rolling Stone"...... As I lay there I reflected on the efficacy and appropriateness of his metaphor. ...and cursed the bloody oxalis.