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["Lynda" <lurine AT softcom.net>]

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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