Blechnum gibbum advice

fortyonenorth(6b)December 14, 2012

I have a new dwarf tree fern - Blechnum gibbum - and was curious about ideal substrate and fertilizing. Most of my houseplants are in either the 5-1-1 or gritty mix, but I've read that Blechnum is an acid lover. The grower has in potted in what appears to be 100% spaghnum peat and is thriving. Also, any harm in transplanting now? It is way oversized for its small container and very rootbound.

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tapla (mid-MI z5b-6a)

The few sights I checked for pH preferences were saying 5.5-6.5, which isn't particularly acidic for containers. I'd worry first about the structural properties and stability of the substrate before pH, and control the pH (if you think it's necessary - I don't) either by using acid-forming fertilizers or preadjusting my irrigation water with white vinegar, citric/sulfuric acid ....

Al

    Bookmark   December 14, 2012 at 12:13PM
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fortyonenorth(6b)

Thanks Al. I'm thinking along those same lines. I'm using something pretty close to the 5-1-1 which should be OK. This is a small plant and won't be in this container or more than a year.

    Bookmark   December 14, 2012 at 10:02PM
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fortyonenorth(6b)

Thanks Al. I'm thinking along those same lines. I'm using something pretty close to the 5-1-1 which should be OK. This is a small plant and won't be in this container or more than a year.

    Bookmark   December 15, 2012 at 7:11AM
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