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  • From: "Lynda" <lurine AT softcom.net>
  • To: <homestead AT lists.ibiblio.org>
  • Subject: Re: [Homestead] Walnut catkins uncertainty
  • Date: Sat, 7 Jun 2008 21:33:30 -0800

I asked DH (landscaper) about this and he said that it is recommended that no part of the black walnut tree, and to a lesser degree the English and Persian walnut trees, be used in compost to be used on certain plants. They are: apple, azalea, white birch, blackberry, blueberry, chrysanthemum, autumn crocus, forget-me-not, grapes, mountain laurel, peony, pine, potatoes, rhodies, thyme and tomatoes.

Some plants are definately tolerant of a mulch/compost with the catkins in it:

Trees/shrubs that are "tolerant" are: arborvitae, white ash, barberry, American beech, black birch, boxelder, buckeye, catalpa, black cherry, crabapple, daphne, flowering dogwood, elderberry, American elm, forsythia, fringetree, goldenrain tree, globeflower, black gum, hawthorn, Canadian hemlock, biviscus, hickory, American holly, honeylocust, honeysuckle, hydrangea, lilac, black locust, sugar/red/black/Japanese maple, ninebark, red/white/scarlet oak, pawpaw, callery pear, Virginia pine, privet, eastern red cedar, eastern redbud, sassafrass, serviceberry, Carolina silverbell, Norway spruce, sumac, sweetgum, sycamore, tulip tree, viburnums and witchhazel.

Flowers/groundcovers that are "tolerant": anemone, aster, astilbe, bee balm, begonia, bittersweet, calendula, clemantis, coral bells, Virginia creeper, daffodill, shasta daisy, daylily, evening primrose, fern (some types), hardy geraniums, goldenrod, wild grape, hollyhock, hosta, grape/oreintal hyacinth, siberian iris, ironweed, jack-in-the-pulpi, lamb's ear, liriope, lobelia, may apple, morning glory, mullein, phlox, primrose, black raspberry, wild rose, rudbeckia, scilla, sedum, speedwell, spiderwort, St. John's wort, sunflower, trillium, tulip, violet, wisteria and yarrow.

Hope this helps.

Lynda
----- Original Message ----- From: "Gene GeRue" <genegerue AT ruralize.com>


Unable to determine pH or potential toxicity or other negativity of
walnut catkins in garden beds or in compost. Anyone know?
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