Tag Archives: Soil pH

Peat Moss vs Coir (Coconut Fiber)

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Both products are used as soil amendments to improve soil structure by lightening the soil and holding moisture; neither adds nutrients to the soil.

COIR

Coir

Peat moss is harvested from peat bogs which are areas of decomposed sphagnum moss in swamps and marshes. Wetland ecologists consider peat moss a non-sustainable material because its harvesting rate is greater than its replenishing rate. Plus, it is harvested from delicate endangered habitats.

Coconut fiber (Coir) is a byproduct of coconut processing; therefore it is always available and sustainable. Coir is made from fibrous coconut husks which are water processed, ground up or decomposed, then made into Coir bricks. Most COIR comes from India, or Sri Lanka.

Differences: pH and water absorption

Product pH – Peat moss is acidic with a pH of 3.3 to 4.0. Therefore, it is used in potting soils for acid loving plants, or it’s used to acidify garden soils with high alkalinity.  A neutral pH is more desirable in most planting situations, so lime is added to peat moss to bring its pH closer to neutral.  Most commercially made peat-moss based potting mixes have added lime. In contrast, Coir has a pH range of 5.2 to 6.6, which makes it more suitable for a wider range of plants.

Water absorption –While proponents of Coir state its water retention is equal to peat moss; peat moss typically retains much more water than Coir.  Peat moss holds 10 to 20 times its dry weight in water, while Coir holds 8 to 9 times its dry weight in water.  Coir does saturate faster than peat moss, thereby using less water to “activate”.  To be fair, Coir comes in various textures and coarseness, which may increase its overall water-holding abilities, but they are not equal.

When given a choice, consider Coir for its closer to neutral pH and its environmental sustainability.

Gardening Tips

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February:  Preparing to plant in the Rogue Valley

wet-soil

Soil: too wet

Grab a handful of your soil, if you can form it into a ball, the soil is too wet for planting and chances are the seeds will rot in the ground. Plant only when the soil crumbles and falls apart after you squeeze it.

Soil pH: Use a pH soil test kit to test your soil. Kits are available at most garden centers. If you soil is too alkaline, above ph7, then incorporate lime into your soil. Lime is best added in the fall, but you can still do this in early spring. Apply Lime early in February, then a week later add in fertilizer.  Both materials should be incorporated into the soil 6 to 8 inches. Wait at least a week after applying fertilizer before planting seeds.

More about modifying soil pH here…
http://www.sunset.com/garden/garden-basics/acid-alkaline-soil-modifying-ph

You can direct sow the following seeds in your garden mid-to-late February, if the soil is no too wet and temperatures are staying above 20 degrees!
Peas, non-enation resistant varieties
Early varieties radish
Spring Spinach
Fave beans
Mustard
Spanish Onions (the most common onion is the USA),

Sow the seeds listed below, indoors or in a greenhouse in February for transplanting into the garden in 6-8 weeks:
Lettuce
Cauliflower
Broccoli
Bok Choy
Pac Choi
Mustard
Cabbage
Kale
Leeks

Article by Carlotta Lucas
Reference: Gardening Year ‘Round, Month by Month in the Rogue Valley and environs, A guide for Family Food Production by the Jackson County Master Gardeners Association
Wet soil photo courtesy of The Sedgwick County Extension Master Gardeners’ Demonstration Garden, Wichita KS

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