All I can add is fascinating. I do have some blueberries that are growing amongst lawn, but they get so little water they don't grow well. I do have plans to install a drip irrigation system. Others have told me that the grass growing around them would not be good for them. These were not experts, just fellow gardeners.

thanx, how interesting

We live just 1/4 mile from a blueberry farm that was recently taken over by a new owner. One of the firs things they did was to pile wood chips around the base of each bush right up against the stems. At least 12 inches high. I don't know if that's a good thing to do, it certainly goes against my understanding of keeping mulch away from the crown of a plant. I have read that adding wood chips when planting can be good because they are bog plants. Over the last few years their plants seem to be doing fine, still seems an odd thing to do.

Mulching blueberries with wood chips makes the soil more acidic ovef timel. They are bog plants, so putting the mulch directly in contact with the bushes should'nt hurt them. There are chelated iron foliar sprays.that penetrate the waxy leaves of blueberries.. I've never heard of planting grasses near them to make iron absorbsion easier. The grass roots would compete with the blueberry roots? I would research any potential grasses to make sure they don't create their own natural herbicides, through allelopathy? I just checked and fescues are recomended for planting with blueberries. I grow Festuca rubra and nodding fescue. Red Fescue is ideal because it grows less than a foot tall.

What about air circulation around the crown and lower branches? I did a bit of searching and the vid I watched said not to mound the mulch over the crown. Not that that vid was the last word by any means.

How valid my experience is may be debatable but in my far distant past, I worked at very well known and successful commercial blueberry farm as a summer ob during high school. The farm, established in 1947, is still a functioning farm, a listed local historic site, owned by the city parks department since 1980 and operated now as a u-pick facility.

Long story short, the 22 acre farm is sited alongside a slough and with a very high water table, the soil remains consistently moist, even through our summer droughts. The very mature bushes. are well over 5 feet tall with bare bases and the entire farm is underplanted with grass.......ordinary meadow grasses, like many orchards are. Both the grass and the blueberries are very lush and the bushes very productive, generating multiple tons of blueberries each season.

Based on that experience, I'd give a lot of credence to the original link.. At the very least, blueberries and grasses can obviously cohabitate very nicely.

The blueberry farm I mentioned above piles the mulch high against the plants. Simply magnificent plants with massive production. Been there for years.