PH Levels In Soil

The Best Soil PH Level For Your Plants

Having the right PH level will contribute to how well your plants absorb nutrients, the plants growth and preventing insufficient blooms or crops. The pH level is a measure of acidity that is represented by a value between 0 and 14. Anything below 7.0 is considered acidic and anything above is alkaline. finding the right balance will ensure your plants thrive and won’t struggle to grow.

 

How can I find out my soil’s PH levels?

You can do this by purchasing a PH level home test kit online or at your local gardening store. When testing your soil make sure your sample is picked from just below the surface for an accurate reading. 

 
Does your soil need adjusting?

If you need to make your soil more acidic adding things such as mulch or compost can improve this. If you need to go the other way and make your soil more alkaline you might consider adding things such as lime, dolomite or poultry manure. 

 

Every plant prefers a different level of acidity. So we have put together a few helpful charts to help you find which pH level is best for your plants. 

 
DOWNLOAD YOUR OWN COPY HERE:
Tree and Shrubs
Flowers
Vegetables
 

Tree’s and Shrubs

PH Level

Apple 5.0-6.5
Ash 6.0-7.5
Azalea 4.5-6.0
Basswood 6.0-7.5
Beautybush 6.0-7.5
Birch 5.0-6.5
Blackberry 5.0-6.0
Blueberry 4.0-6.0
Boxwood 6.0-7.5
Cherry, sour 6.0-7.0
Chestnut 5.0-6.5
Crab apple 6.0-7.5
Dogwood 5.0-7.0
Elder, box 6.0-8.0
Fir, balsam 5.0-6.0
Fir, Douglas 6.0-7.0
Hemlock 5.0-6.0
Hydrangea, blue-flowered 4.0-5.0
Hydrangea, pink-flowered 6.0-7.0
Juniper 5.0-6.0
Laurel, mountain 4.5-6.0
Lemon 6.0-7.5
Lilac 6.0-7.5
Maple, sugar 6.0-7.5
Oak, white 5.0-6.5
Orange 6.0-7.5
Peach 6.0-7.0
Pear 6.0-7.5
Pecan 6.4-8.0
Pine, red 5.0-6.0
Pine, white 4.5-6.0
Plum 6.0-8.0
Raspberry, red 5.5-7.0
Rhododendron 4.5-6.0
Spruce 5.0-6.0
Walnut, black 6.0-8.0
Willow 6.0-8.0

 

Vegetables

PH Level

Asparagus 6.0-8.0
Bean, pole 6.0-7.5
Beet 6.0-7.5
Broccoli 6.0-7.0
Brussels sprout 6.0-7.5
Cabbage 6.0-7.0
Carrot 5.5-7.0
Cauliflower 5.5-7.5
Celery 5.8-7.0
Chive 6.0-7.0
Cucumber 5.5-7.0
Garlic 5.5-8.0
Kale 6.0-7.5
Lettuce 6.0-7.0
Pea, sweet 6.0-7.5
Pepper, sweet 5.5-7.0
Potato 4.8-6.5
Pumpkin 5.5-7.5
Radish 6.0-7.0
Spinach 6.0-7.5
Squash, crookneck 6.0-7.5
Squash, Hubbard 5.5-7.0
Tomato 5.5-7.5

 

Flowers

PH Level

Alyssum 6.0-7.5
Aster, New England 6.0-8.0
Baby’s breath 6.0-7.0
Bachelor’s button 6.0-7.5
Bee balm 6.0-7.5
Begonia 5.5-7.0
Black-eyed Susan 5.5-7.0
Bleeding heart 6.0-7.5
Canna 6.0-8.0
Carnation 6.0-7.0
Chrysanthemum 6.0-7.5
Clematis 5.5-7.0
Coleus 6.0-7.0
Coneflower, purple 5.0-7.5
Cosmos 5.0-8.0
Crocus 6.0-8.0
Daffodil 6.0-6.5
Dahlia 6.0-7.5
Daisy, Shasta 6.0-8.0
Daylily 6.0-8.0
Delphinium 6.0-7.5
Foxglove 6.0-7.5
Geranium 6.0-8.0
Gladiolus 5.0-7.0
Hibiscus 6.0-8.0
Hollyhock 6.0-8.0
Hyacinth 6.5-7.5
Iris, blue flag 5.0-7.5
Lily-of-the-valley 4.5-6.0
Lupine 5.0-6.5
Marigold 5.5-7.5
Morning glory 6.0-7.5
Narcissus, trumpet 5.5-6.5
Nasturtium 5.5-7.5
Pansy 5.5-6.5
Peony 6.0-7.5
Petunia 5.5-6.0
Phlox, summer 6.0-8.0
Poppy, oriental 6.0-7.5
Rose, hybrid tea 5.5-7.0
Rose, rugosa 6.0-7.0
Snapdragon 5.5-7.0
Sunflower 6.0-7.5
Tulip 6.0-7.0
Zinnia 5.5-7.0

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Recommended depths

Typically you need a finishing layer of screened soil of 100mm when working with an uneven surface. 100mm of soil will allow to even out any hollows and give enough depth to create a flat surface

A general rule for compost is to allow for the depth of the current root structure of your plants with an additional 30-50% to mix in with the base. If you’re planting into holes or filling up a vege garden  you will need to accommodate for this prior to filling up

We recommend 100mm (10cm) deep for new bark gardens and planting into bare areas. For existing gardens with some cover, we recommend 75mm-100mm (7.5cm-10cm)

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This product isn’t distributed directly by Wholesale Landscapes. We can only guarantee stock at our Lifestyles Yard located at 55, Saxton Road, Stoke, Nelson. 

If this doesn’t suit you or you require a smaller volume under 1.5m3, please see the list of retailers for the same or similar alternative products.

Nelson
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  • Stoke Garden & Landscapes

Richmond
  • Bay Landscape & Garden Centre

  • Goldpine Richmond

Mapua
  • Mapua Landscapes

Motueka
  • Stonescape Landscape Supplies (Concrete & Metals)

North Canterbury
  • Woodend Landscape Supplies

Christchurch
  • Garden Box – Middleton

  • Urban Paving – Harewood

  • Pearsons Landscape Supplies – Bromley

  • Styx Mill Landscape & Nursery  – Styx               

  • Mitre 10 Ferrymead 

South Canterbury
  • Fulton Hogan Timaru

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