Craig Dremann's CALIFORNIA Serpentine
SOIL NUTRIENT and ORGANIC MATTER THRESHOLDS for native seedlings with data links, for San Mateo and Santa Clara Counties.

The Reveg Edge, P.O. Box 361, Redwood City, CA 94064

Copyright © 2018 by Craig C. Dremann - 650-325-7333 - email

No links = Thresholds that still need to be determined, using the Waypoint Lab A-17 soil test plus an A-19-2 organic matter test that are run from the top 2 inches of soil taken from next to seedlings of each species, and then tests run, data only, in a bar graph format.

A second soil sample is taken from bare soil within 10 feet of the first sample, to confirm the threshold levels set by the first soil sample. Each soil sample needs to be a one-quart ziplock bag full, which has been sifted through a inch mesh screen to remove any rocks or vegetation matter.

Waypoint Lab protocols and the sample form to send in with the soil samples for the A-17 and A-19-2 tests, can be downloaded at

Waypoint Lab: 4741 East Hunter Ave., Suite A
Phone: (714) 282-8777

Links below, are the test results for the soil nutrient and organic matter thresholds that are needed for seedling survival for each species.

Bold = Suggested first test subjects.

! = Pseudomonas bacteria host plant, that help create the rain clouds--see Discover Magazine 2012 article

Bromus carinatus shade ecotype - California Brome
Bromus carinatus v. brevariastatus - Short Brome full sun type
Danthonia californica - Danthonia

Deschampsia elongata - Slender Hairgrass
Elymus elymoides - Squirreltail Grass
Elymus glaucus Blue - Wild Rye
Festuca occidentalis - Western fescue

Hordeum brachyantherum - Meadow Barley
Leymus triticoides - Creeping Wild Rye
Melica californica - California Melic
Melica imperfecta - Small-flowered Melicgrass
Nassella lepida - Foothill Needlegrass
Nassella pulchra - Purple Needlegrass
Vulpia microstachys - Native vulpia grass


Apiaceae Lomatium californicum - California Lomatium
Apiaceae Perideridia kelloggii - Kellogg Yampah
Apiaceae Sanicula bipinnatifida - Purple Sanicle
Apiaceae Sanicula crassicaulis - Pacific Sanicle

Asclepiadaceae Asclepias fascicularis - Narrowleaf Milkweed

Asteraceae Achillea millefolium - Common Yarrow
Asteraceae Achyrachaena mollis - Blow Wives
Asteraceae Aster chilensis - Common California Aster
Asteraceae Baccharis pilularis - Coyote Brush
Asteraceae Filago californica - California Fluffweed
Asteraceae Grindelia camporatum - Valley Gumplant
Asteraceae Gnaphalium californicum - California Everlasting
Asteraceae Gnaphalium canescens ssp benolans - Fragrant Everlasting
Asteraceae Gnaphalium purpureum - Purple Cudweed
Asteraceae Helenium puberulum - Sneezeweed
Asteraceae Hemizonia congesta ssp. luzulifolia - Hayfield Tarweed
Asteraceae Heterotheca sessiliflora - Bristly Goldenaster
Asteraceae Holocarpha virgata - Sticky Tarweed
Asteraceae Lagophylla ramosissimum - Common Hareleaf
Asteraceae Lasthenia californica - California Goldfields
Asteraceae Lessingia germanorum - San Francisco Lessingia
Asteraceae Madia gracilis - Slender Tarweed
Asteraceae Madia sativa - Coast Tarweed
Asteraceae Micropus californicus - Slender Cottonweed
Asteraceae Solidago californica California Goldenrod
Asteraceae Wyethia angustifolia Narrow-leafed Mule Ear
Asteraceae Wyethia glabra Mules Ears

Boraginaceae Amsinckia menziesii var. intermedia - Fiddleneck
Boraginaceae Cynoglossum grande - Hounds-tongue

Brassiaceae Cardamine californica - Common Milkmaids
Brassiaceae Cardamine oligosperma - Bittercress

Convolvulaceae Calystegia subacaulis - Hill Morning Glory
Cucurbitaceae Marah fabaceus - Wild Cucumber
Eurphorbiaceae Eremocarpus setigerus - Turkey Mullein

Fabaceae Astragalus gambellianus - Gambel Milkvetch
Fabaceae Lathyrus vestitus - Woodland Pea
Fabaceae Lotus humistratus - Hill Lotus
Fabaceae Lotus purshianus var. purshianus - Spanish Clover
Fabaceae Lotus scoparius - Deerweed
Fabaceae Lupinus albifrons - Bush Lupine
Fabaceae Lupinus bicolor - Miniature Lupine
Fabaceae Lupinus formosus - Summer Lupine
Fabaceae Lupinus succulentus - Arroyo Lupine

Fabaceae Trifolium albopurpureum - Branched Indian Clover
Fabaceae Trifolium barbigerum - Bearded Clover
Fabaceae Trifolium fucatum - Bull Clover
Fabaceae Trifolium variegatum - Whitetip Clover
Fabaceae Trifolium willdenovii - Tomcat Clover
Fabaceae Vicia americana var. americana - American Vetch

Hydrophyllaceae Nemophila menziesii - Baby-blue-eyes
Hydrophyllaceae Phacelia heterophylla - Varied Leaf Phacelia
Hydrophyllaceae Phacelia tanacetifolia - Tansy Phacelia
Iridaceae Sisyrinchium bellum - Blue-eyed Grass

Lamiaceae Acanthomintha duttonii - San Mateo Thornmint
Lamiaceae Monardella villosa - Coyote Mint

Liliaceae Brodiaea elegans - Elegant Brodiaea
Liliaceae Calochortus albus - Fairy Lantern
Liliaceae Calochortus argillosus - Clay-loving Mariposa Tulip
Liliaceae Calochortus luteus - Yellow Mariposa
Liliaceae Calochortus superbus - Superb Mariposa Lily
Liliaceae Chlorogalum pomeridianum - Soap Plant
Liliaceae Dichelostemma capitatum - Blue Dicks
Liliaceae Dichelostemma congestum - Fork-Toothed Ookow
Liliaceae Triteleia hyacinthina - White Brodiea
Liliaceae Triteleia laxa- Ithuriel's Spear
Liliiaceae Trillium chloropetalum - Common Trillium

Linaceae Hesperolinon congestum - Marin Dwarf Flax
Linaceae Hesperolinon micranthum - Dwarf Flax
Linaceae Linum lewisii - Western Blue Flax
Malvaceae Malacothamnus fasciculatus - Bush Mallow
Malvaceae Sidalcea malviflora - Checker-bloom

Onagraceae Camissonia ovata - Suncup
Onagraceae Clarkia francisciana - Presidio Clarkia
Onagraceae Clarkia purpurea - Winecup Clarkia
Onagraceae Clarkia rubicunda - Ruby Chalice Clarkia
Onagraceae Clarkia unguiculata - Elegant Clarkia
Onagraceae Epilobium brachycarpum - Parched Fireweed
Onagraceae Epilobium ciliatum subsp. ciliatum - Fringed Willowherb

Papervaceae Eschscholzia californica - California Poppy
Plantaginaceae Plantago erecta - California Plantain

Polemoniaceae Gilia achilleifolia - Globe Gilia
Polemoniaceae Gilia tricolor - Bird's-eye Gilia
Polemoniaceae Navarretia squarrosa - Skunkweed
Polygonaceae Eriogonum nudum - Naked-stemmed Buckwheat

Portulacaceae Calandrinia ciliata - Red Maids
Portulacaceae Claytonia perfoliata - Miner's Lettuce
Primulaceae Dodecatheon hendersonii - Shooting Star
Primulaceae Trientalis latifolia - Pacific Starflower

Ranunculaceae Clematis lasiantha - Virgin's Bower
Ranunculaceae Ranunculus californicus - California Buttercup

Rosaceae Potentilla glandulosa - Sticky Cinquefoil

Scrophulariaceae Castilleja exserta - Purple Owl's Clover
Scrophulariaceae Collinsia heterophylla - Chinesehouses
Scrophulariaceae Cordylanthus pilosus - Gray Hairy Bird's Beak


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Updated March 6, 2019