I find it interesting that the positive reviews, on this product, are really, really good, while the negatives are really, really bad. Any thoughts?

I think that many fewer people with good experience participate in opinions and ratings than those with bad experience. I can only say I’m happy with mine. It works as expected and is much easier to read than my previous meter. Side by side, they both read very close to the same.

Does it come with a list of plants and their watering needs??? Once I know the moisture around a plant, how do I know what that plant needs?

I've been an avid gardener for 45 years. Even though I have a vast knowledge of plant material, this question cannot be answered without knowing plants in general. You'd have to have 1000's of volumes of plants listed with requirements from all over the world, with varying climate zones.

pH is reading quite low. Is there a way to create a test mixture with known pH to check the meter?

If you read my original review, I did not even open the packaging when this product arrived, and it was because the dial did not provide for adequate accuracy in its readout. But, what you are looking for is a 'standard' against which to measure the performance of this instrument, which are available for purchase (scientific supply) -- but since you cannot really tell with confidence where on the Gain Express dial pH 6.0 falls, versus 5.8 or 6.2 or 6.4 (remember, pH is a logarithmic scale so these differences are significant), I do not see how using a standard would help establish its accuracy. The dial on the instrument that I received in fulfillment of my order was narrower, squeezed down, and -- most importantly -- without precise lines showing exactly what needle position the pH numbers on the dial refer to, and! with only whole-number pH markings there anyway (not like the dial shown in image featured here which does appear to provide more detail . . ) , so I do not know how to be of help.

Is the probe shaft steel, or Al/Cu? Had problems with other probes bending

Not steel, probably Al/Cu but I don't think bending would be a problem if your soil isn't TOO hard or you don't push against a rock.

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🌿 Master your soil, master your garden—no guesswork, just growth!

EXTENDED REACH - 11.6-inch long electrode ensures deep soil penetration for reliable readings.
COMPACT PORTABLE - Lightweight 159g design fits perfectly on your tabletop or in your toolkit.
PRECISION P H CONTROL - Accurately measure soil acidity within ±0.2 pH for optimal plant health.
USER FRIENDLY DESIGN - Simple, intuitive use makes soil testing effortless for busy professionals.
ECO FRIENDLY OPERATION - No batteries or electricity required—plug and read instantly, anytime.

The GAIN EXPRESS Soil Acidity Meter is a precision instrument designed to measure soil pH levels from 3 to 8 with ±0.2 accuracy. Featuring an 11.6-inch long electrode for deep soil testing, it operates without batteries or electricity, offering an eco-friendly and hassle-free experience. Lightweight and easy to use, it’s ideal for professionals seeking reliable soil data to optimize plant health and productivity.

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Manufacturer	Gain Express Holdings Ltd.
Part number	FBA_701936211996
Item Weight	159 g
Product Dimensions	12.7 x 10.16 x 12.7 cm; 158.76 g
Is Discontinued By Manufacturer	No
Number Of Pieces	1
Mounting Type	Tabletop
Batteries Included	No
Batteries Required?	No
Item Dimensions LxWxH	12.7 x 10.2 x 12.7 cm

GAIN EXPRESS Soil Acidity Meter, Moisture Meter, Soil Measuring Instrument, Soil pH Meter, 11.6 inches (295 mm), Long Electrode, Japanese Instruction Manual (English Language Not Guaranteed)

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