I recently purchases a new garden hose and was eager to replace an old leaky one that came with the house.
It was during the summer and I watered as usual the flower beds... the next day the flowers were all but dead... I kept watering but with a different hose because I needed/moved the new hose to driveway to wash cars..
Slowly the flowers started to come back... over several weeks.
Last week I moved the new hose back the garden and watered... it was about 75... the next day the flowers were all but dead again???
Then it dawned on me that just prior to the die-backs I had used the "New" 50' garden hose... this is a new style with larger aluminum hose ends and not the typical black Craftsman hoses I normally buy with solid brass fittings.
The only other thing I noted is when I first used the new hose the water was a cloudy white at first flow.
Started doing research and could not find anything specific to Harbor Freight but I did find a 2016 report on toxins in gardens hoses... some were clean and some tested high in bad things... the report went on to say that some hoses use recycled e-waste in their composition... which included heavy metals and plasticizers The clean ones are generally labeled drinking water safe...
Here is one except for googling...
The Toxic Soup in Your Garden Hose. 38% of the hoses also contained bromine and antimony, chemicals that can lead to thyroid, kidney and liver damage with prolonged exposure. The hoses were also tested for phthalates, a class of chemicals added to plastics and cosmetic products to keep them soft and flexible
Is Your Garden Hose Toxic?
Harmful Chemicals: Is Your Garden Hose Toxic? | TIME.com
As kids we always drank from the hose without giving it a second thought...