Friday, 8 November 2013

A Basic Idea-Soil pH

When any seed doesn't germinate with in reasonable time we blame the seed supplier, seed quality, climate etc. However we normally ignore whether the soil contains the required nutrients for the specific seed/plant.  To know the soil condition we have to measure soil pH level. The soil pH is a measure of the acidity or alkaline in soil. 

Plant roots absorb mineral nutrients such as Nitrogen and Iron when they are desolved in water. If the soil solution is too acid or alkaline some nutrients won't dissolve easily so they won't be available for uptake by roots. Soil pH is measured in a scale of 0 to 14. Where 0 being the most acidic and 14 is the most alkaline and 7 stands for neutral. To give you an example lemon juice can be of the range of 1 to 2 signifies very acidic where as soapy water can be of a pH of 11 to 12 which means it is very alkaline.



This pH is calculated on the logarithm scale so a difference between one point is equal to 10 times acidity. i.e, the pH of 6 is 10 times more acidic than pH 7 and 10 times less acidic than pH 5.


Soil condition varies place to place.  Your garden soil pH could be different from that of your friend's garden across town.  Therefore you should know soil pH of your garden before choosing plants.  Most garden plants grow well in slightly acid to neutral soil (pH 6-7). You can alter your soil condition after determining soil pH level from the soil testing labs. You can also test soil pH yourself with a home soil test kit or portable pH meter.  How to alter the pH level, please take expert opinion.

I hope this gives you basic idea about soil pH and its effect.

I provide below list of preferred pH range of various plants for your immediate reference. Source : gardenexpress.com.au.

Plant NamePreferred pH Range*
Abelia6.0-8.0
Abutilon5.5-6.5
Acacia6.0-8.0
Acanthus6.0-7.0
Aconitum5.0-6.0
Acorus5.0-6.5
Adonis6.0-8.0
Aechmea5.0-5.5
African Violet6.0-7.0
Ageratum6.0-7.5
Ailanthus6.0-7.5
Ajuga4.0-6.0
Althea6.0-7.5
Alyssum6.0-7.5
Amaranthus6.0-6.5
Amaryllis5.5-6.5
Anchusa6.0-7.5
Androsace5.0-6.0
Anemone6.0-7.5
Anthurium5.0-6.0
Anthyllis5.0-6.0
Apostle Plant5.5-6.5
Apple5.0-6.5
Apricot6.0-7.0
Aralia6.0-7.5
Arbutus4.0-6.0
Ardisia6.0-8.0
Arenaria6.0-8.0
Aristia6.0-7.5
Armeris6.0-7.5
Arnice5.0-6.5
Arrowhead5.0-6.0
Artichoke6.5-7.5
Asparagus6.0-8.0
Asparagus Fern6.0-8.0
Asperula6.0-8.0
Asphodoline6.0-8.0
Aster5.5-7.5
Astilbe6.0-8.0
Aubretia6.0-7.5
Avens6.0-7.5
Avocado6.0-7.5
Azalea4.5-6.0
Azalea4.5-6.0
Baby's Breath6.0-7.5
Baby's Tears5.0-6.0
Banana5.0-7.0
Basil5.5-6.5
Bean (Runner, Broad, French)6.0-7.5
Beauty Bush6.0-7.5
Beetroot6.0-7.5
Begonia5.5-7.0
Bergenia6.0-7.5
Bird of Paradise6.0-6.5
Bishop's Cap5.0-6.0
Blackberry5.0-6.0
Black-eyed Susan5.5-7.5
Bleeding Heart6.0-7.5
Blood Leaf5.5-6.5
Bluebell6.0-7.5
Bottle Brush6.0-7.5
Bougainvillea5.5-7.5
Boxwood6.0-7.5
Broccoli6.0-7.0
Bromeliads5.0-6.0
Broom5.0-6.0
Brussels Sprouts6.0-7.5
Buddleia6.0-7.0
Buphthaium6.0-8.0
Butterfly Flower6.0-7.5
Cabbage6.0-7.5
Cactus4.5-6.0
Calabrese6.5-7.5
Caladium6.0-7.5
Calceolaria6.0-7.0
Calendula5.5-7.0
Calla lily6.0-7.0
Camassia6.0-8.0
Camellia4.5-5.5
Candytuft6.0-7.5
Canna6.0-8.0
Canterbury Bells6.0-7.5
Capsicum Pepper5.0-6.5
Cardinal Flower5.0-6.0
Carnation6.0-7.5
Carrot5.5-7.0
Cast Iron Plant4.0-5.5
Castor Oil Plant5.5-6.5
Catalpa6.0-8.0
Cauliflower5.5-7.5
Celery6.0-7.0
Celosia6.0-7.0
Centaurea5.0-6.5
Century Plant5.0-6.5
Cerastium6.0-7.0
Cherry6.0-7.5
Chicory5.0-6.5
Chinese Cabbage6.0-7.5
Chinese Evergreen5.0-6.0
Chinese Lantern6.0-7.5
Chinese Primrose6.0-7.5
Chives6.0-7.0
Christmas Cactus5.0-6.5
Chrysanthemum6.0-7.0
Cineraria5.5-7.0
Cissus6.0-7.5
Cistus6.0-7.5
Clarkia6.0-6.5
Cleanthus6.0-7.5
Clematis5.5-7.0
Clerodendrum5.0-6.0
Clivia5.5-6.5
Cockscomb6.0-7.5
Coffee Plant5.0-6.0
Colchicum5.5-6.5
Coleus6.0-7.0
Columbine6.0-7.0
Columnea4.5-5.5
Convolvulus6.0-8.0
Coral Berry5.5-7.5
Coreopsis5.0-6.0
Corn - Sweet5.5-7.5
Coronilla6.5-7.5
Corydalis6.0-8.0
Cosmos5.0-8.0
Cotoneaster6.0-8.0
Courgettes5.5-7.0
Crab Apple6.0-7.5
Cranberry5.5-6.5
Crassula5.0-6.0
Creeping Fig5.0-6.0
Cress6.0-7.0
Crocus6.0-8.0
Croton5.0-6.0
Crown of Thorns6.0-7.5
Cucumber5.5-7.0
Cuphea6.0-7.5
Currant - Black6.0-8.0
Currant - Red5.5-7.0
Currant - White6.0-8.0
Cyclamen.6.0-7.0
Cynoglossum6.0-7.5
Cyperus5.0-7.5
Daffodii6.0-6.5
Dahlia6.0-7.5
Damson6.0-7.5
Daphne6.5-7.5
Day Lily6.0-8.0
Delphinium6.0-7.5
Deutzia6.0-7.5
Devil's Ivy5.0-6.0
Dianthus6.0-7.5
Dielfenbachia5.0-6.0
Dipladenla6.0-7.5
Dizygotheca6.0-7.5
Dogwood5.0-7.0
Dracaena5.0-6.0
Dragon Tree5.0-7.5
Dutchman's Pipe6.0-8.0
Easter lily6.0-7.0
Edelweiss6.5-7.5
Elaeagnus5.0-7.5
Elephant's Ear6.0-7.5
English Ivy6.0-7.5
Enkianthus5.0-6.0
Episcia6.0-7.0
Erica4.5-6.0
Eucalyptus6.0-8.0
Euphorbia6.0-7.0
Everlasting5.0-6.0
Fan Iris6.0-8.0
Feijoa5.0-7.5
Fennel5.0-6.0
Fern - Bird's Nest5.0-5.5
Fern - Boston5.5-6.5
Fern - Button6.0-8.0
Fern - Christmas6.0-7.5
Fern - Cloak6.0-7.5
Fern - Feather5.5-7.5
Fern - Hart's Tonge7.0-8.0
Fern - Holly4.5-6.0
Fern - Maidenhair6.0-8.0
Fern - Rabbits Foot6.0-7.5
Fern - Spleenwort6.0-7.5
Fig (Ficus)5.0-6.0
Firethorn6.0-8.0
Fittonia5.5-6.5
Forget-me-not6.0-8.0
Forsythia6.0-8.0
Foxglove6.0-7.5
Freesia6.0-7.5
French Marigold5.0-7.5
Fritillaria6.0-7.5
Fuchsia5.5-6.5
Gaillardia6.0-7.5
Gardenia5.0-6.0
Garlic5.5-7.5
Gazania5.5-7.0
Genista6.5-7.5
Gentiana5.0-7.5
Geranium6.0-8.0
Geum6.0-7.5
Ginger6.0-8.0
Gladioli6.0-7.0
Globularia5.5-7.0
Gloxinia5.5-6.5
Godetia6.0-7.5
Goldenrod5.0-7.0
Gooseberry5.0-6.5
Gourd6.0-7.0
Grape Hyacinth6.0-7.5
Grape Ivy5.0-6.5
Grapefruit6.0-7.5
Grapevine6.0-7.0
Grass - Bent5.5-6.5
Grass - Clover6.0-7.0
Grass - Fesau6.0-7.5
Grass - Meadow6.0-7.5
Grass - Pampas6.0-8.0
Grass - Rye6.0-7.0
Grevillea5.5-6.5
Gypsophllla6.0-7.5
Hawthorn6.0-7.0
Hazelnut6.0-7.0
Hedera (Ivy)6.0-7.5
Heliotropium6.0-8.0
Hellanthus5.0-7.0
Helleborus6.0-7.5
Hens & Chickens6.0-7.0
Herringbone Plant5.0-6.0
Hibiscus6.0-8.0
Holly5.0-6.5
Hollyhock6.0-8.0
Honeysuckle6.0-7.5
Hop6.0-7.5
Horseradish60-7.0
Hoya5.0-6.5
Hyacinth6.5-7.5
Hydrangea (Blue)4.0-5.0
Hydrangea (Pink)6.0-7.0
Hydrangea (White)6.5-8.0
Hyperitum5.5-7.0
Ice Plant6.0-8.0
Ii Never Never Plant5.0-6.0
Impatiens (Busy Lillie)5.5-6.5
Inch Plant5.0-6.0
Indigofera6.0-7.5
Iresine5.0-6.5
Iris5.0-6.5
Ivy6.0-8.0
Ivy Tree6.0-7.0
Jacaranda6.0-7.5
Japanese Sedge6.0-8.0
Jasminum5.5-7.0
Jerusalem Cherry5.5-6.5
Jessamine5.0-6.0
Juniper5.0-6.5
Kaffir6.0-7.5
Kalanchoe6.0-7.5
Kale6.0-7.5
Kalmia4.5-5.0
Kangaroo Thorn6.0-8.0
Kangaroo Vine5.0-6.5
Kerria6.0-7.0
Kohlrabi6.0-7.5
Laburnum6.0-7.0
Lace Flower6.0-7.5
Lantana5.5-7.0
Laurel4.5-6.0
Laurus (Bay Tree)5.0-6.0
Lavender6.5-7.5
Leek6.0-8.0
Lemon6.0-7.0
Lemon Plant6.0-7.5
Lentil5.5-7.0
Lettuce6.0-7.0
Liatris5.5-7.5
Ligustrum5.0-7.5
Lilac6.0-7.5
Lily of the Valley4.5-6.0
Lithospermum5.0-6.5
Lobelia6.0-7.5
Lupinus5.5-7.0
Lychee6.0-7.0
Magnolia5.0-6.0
Mahonia6.0-7.0
Mango5.0-6.0
Marguerite6.0-7.5
Marigold5.5-7.0
Marjoram6.0-8.0
Marrow6.0-7.5
Melon5.5-6.5
Millet6.0-6.5
Mimosa5.0-7.0
Mind Your Own Business5.0-5.5
Mint7.0-8.0
Mollnia4.0-5.0
Monstera (Swiss Cheese Plant)5.0-6.0
Moraea5.5-6.5
Morning Glory6.0-7.5
Moss6.0-8.0
Moss, sphagnum3.5-5.0
Mother-of-Thousands5.0-6.0
Mulberry6.0-7.5
Mushroom6.5-7.5
Mustard6.0-7.5
Myosotis6.0-7.0
Myrtle6.0-8.0
Narcissus6.0-7.5
Nasturtium5.5-7.5
Nectarine6.0-7.5
Nephthytis4.5-5.5
Nicodernia (Indoor Oak)6.0-8.0
Nicotiana5.5-6.5
Nicotlana5.5-6.5
Norfolk Island Pine5.0-6.0
Oleander6.0-7.5
Olive5.5-6.5
Onion6.0-7.0
OpIisemenus5.0-6.0
Orange Plant6.0-7.5
Orchid4.5-5.5
Oxalis6.0-8.0
Pachysandra5.0-8.0
Paeonia6.0-7.5
Painted Lady6.0-7.5
Palms6.0-7.5
Pandanus5.0-6.0
Pansy5.5-7.0
Papaw6.0-7.5
Paprika7.0-8.5
Parsley5.0-7.0
Pasque Flower5.0-6.0
Passion Flower6.0-8.0
Patient Lucy5.5-6.5
Paulownia6.0-8.0
Pea6.0-7.5
Peach6.0-7.5
Peacock Plant5.0-6.0
Peanut5.0-6.5
Pear6.0-7.5
Pea-Sweet6.0-7.5
Pelagoniums6.0-7.5
Pellionia5.0-6.0
Penstemon5.5-7.0
Peony6.0-7.5
Peperomia5.0-6.0
Pepper5.5-7.0
Peppermint6.0-7.5
Periwinkle6.0-7.5
Petunia6.0-7.5
Philodendron5.0-6.0
Phlox5.0-6.5
Pilea6.0-8.0
Pineapple5.0-6.0
Pinks6.0-7.5
Pistacio5.0-6.0
Pitcherplant4.0-5.5
Pittosporum5.5-6.5
Plantain6.0-7.5
Plum6.0-7.5
Plumbago5.5-6.5
Podocarpus5.0-6.5
Poinsettia6.0-7.5
Poligonum6.0-7.5
Polyanthus6.0-7.5
Polyscias6.0-7.5
Pomegranate5.5-6.5
Poppy6.0-7.5
Portulaca5.5-7.5
Potato4.5-6.0
Potato-Sweet5.5-6.0
Pothos5.0-6.0
Prayer Plant5.0-6.0
Primrose5.5-6.5
Primula6.0-7.5
Privet6.0-7.0
Prunella6.0-7.5
Prunus6.5-7.5
Pumpkin5.5-7.5
Puncia5.5-6.5
Pyracantha5.0-6.0
Pyrethrum6.0-7.5
Quince6.0-7.5
Radish6.0-7.0
Raspberry5.0-6.5
Rhododendron4.5-6.0
Rhubarb5.5-7.0
Rice5.0-6.5
Rose - Climbing6.0-7.0
Rose - Hybrid Tea5.5-7.0
Rose - RamblIng5.5-7.0
Rosemary5.0-6.0
Rubber Plant5.0-6.0
Sage5.5-6.5
Salvia6.0-7.5
Sansevieria4.5-7.0
Santpaulia6.0-7.0
Saxifraga6.0-8.0
Scabiosa5.0-7.5
SchizanthUs6.0-7.0
Scilla6.0-8.0
Sea Grape5.0-6.5
Sedum6.0-8.0
Selaginella6.0-7.0
Senecio6.0-7.0
Shallot5.5-7.0
Shrimp Plant5.5-6.5
Snapdragon5.5-7.0
Snowdrop6.0-8.0
Soapwort6.0-7.5
Sorghum5.5-75
Soyabean5.5-6.5
Spanish Bayonet5.5-7.0
Spearmint55-7.5
Speedwell5.5-6.5
Spider Plant6.0-7.5
Spinach6.0-7.5
Spirea6.0-7.5
Spruce4.0-5.0
Star of Bethlehem6.0-8.0
Stock6.0-7.5
Stonecrop6.5-7.5
Strawberry5.0-7.5
Succulents5.0-6.5
Sumach5.0-6.5
Sunflower6.0-7.5
Swede5.5-7.0
Sweet William6.0-7.5
Syringa6.0-8.0
Tamarix6.5-8.0
Thunbergia5.5-7.5
Thyme5.5-7.0
Tobacco5.5-7.5
Tomato5.5-7.5
TrillIum5.0-6.5
Tulip6.0-7.0
Turk's Cap6.0-7.0
Turnip5.5-7.0
Umbrella Tree5.0-7.5
Velvet Plant5.5-6.5
Venus Flytrap4.0-5.0
Verbena6.0-8.0
Viburnum5.0-7.5
Vinca6.0-7.5
Viola5.5-6.5
Violet5.0-7.5
Violet Flame6.0-7.0
Virginia Creeper5.0-7.5
Wallflower5.5-7.5
Wandering Jew5.0-6.0
Water Cress6.0-8.0
Water Lily5.5-6.5
Watermelon5.5-6.5
Weeping Fig5.0-6.0
Weyela6.0-7.0
Winter Creeper5.5-7.0
Wistine6.0-8.0
Yucca6.0-8.0
Zebra Plant5.0-6.0
Zinna5.5-7.5

* The table above is not an exhaustive list of plants. Although the suggested preferred range is believed to be reasonable accurate, it should only be used as a general guide and a professional should be consulted if necessary for advice on the requirements of specific plants in a specific soil type.

 Do post your comments.

2 comments:

  1. Your picture has an error. The pH scale starts at 1, not at 0. you can only have a pH between 1-14, it can't go below 1.

    ReplyDelete
  2. All MNC company need interior designs for new look. Its help look and feel gud.

    ReplyDelete