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Mary, Mary, quite contrary, how does your garden grow?

A project log for Soil moisture monitoring in a flower garden

When do your flowers have enough water, and how do you know?

joseph-eoffJoseph Eoff 09/22/2024 at 13:470 Comments

I've been intending to update this project, but there's really no new data to share.

The Raspberry Pi I had collecting the data died a while back.  I've replaced the SSD and reinstalled much of the software, but haven't gotten around to making it all work again.

Instead of posting data, I'll just post a few pictures of the flower garden.

All the flowers and shrubs are blooming and growing.  It looks kind wild, I guess.  I'm no landscape architect.  We just put flowers that we like in the garden and try to keep all the wilted flowers trimmed.  Nothing fancy, just a wild profusion of pretty things growing.

I haven't had to water the garden this year.  I just make sure there's at least 4 inches (10 cm) of bark covering the ground, and the soil moisture regulates itself.

I do give the garden 100 liters of water in the springtime, but that's more for the fertilizer.  I mix one liter of liquid fertilizer with 100 liters of water (the recommended ratio from the fertilizer manufacturer) and pump it through the watering drip lines my son and I installed before I found out that I don't really need to water the garden.

We use the water in the rain barrel for the two potted roses that stand next to the front door of the house (to the right of the cat in the last picture.)


Our cat Snow likes to sleep under the big rose bush by the rain barrel.  It's warm from the sun, but shady enough that she doesn't get a sunburn.  Yes, cats can get a sunburn despite the fur. As a white cat, she's especially susceptible to sunburn on her ears.

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