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At a local grocery store, I bought some young ginger (Zingiber officinale) that was harvested about 3 days ago. It includes the rhizome, some shoots, and part of the stems (refer to the picture below). The width of each of the three rhizomes in the picture is about 10 centimeters (4 inches).

I want to propagate these ginger roots. How deep should I bury these rhizomes in loamy soil? Where should the soil line be? I am guessing that the soil line should be at the pinkish parts of the ginger, but I am unsure.

Three ginger rhizomes with shoots and cut stems

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Your guess is correct - plant parts above the soil level will be green to allow photosynthesis, whereas the parts below the soil level don’t participate in photosynthesis and are consequently not green.

Ginger is planted quite close to the surface, one or two inches deep. I would recommend using the stalk color as guideline in your case, certainly not deeper than the start of the green part, rather err on the shallower side.

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  • I forgot to mention that I am growing this ginger in a hot and humid tropical climate in USDA hardiness zone 13b. Does your answer change depending on the USDA hardiness zone in which the ginger is planted?
    – Flux
    Commented May 17 at 6:23
  • No. Also consider: if your mom bought the ginger locally, the evident growth pattern should fit perfectly to your location.
    – Stephie
    Commented May 17 at 11:59
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I've grown ginger for 3 seasons in hardiness area 8a. I was told ginger could not be grown here because it is a "subtropical" plant. But it has done very well mulched overwinter with 12" of maple leaves. I agree with @Stephie that it should be planted shallow, with the green parts just poking above the soil. I did this with some rhizomes which I overwintered indoors as an experiment. They did well when re-planted in the spring

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  • Thank you for the information. I forgot to mention that I am growing this ginger in USDA hardiness zone 13b.
    – Flux
    Commented May 17 at 6:19

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