WETTING AGENT - A chemical solution that lowers surface tension and causes film to dry faster and more evenly, thereby reducing the risk of water spots on the film.
Wetting agent - compound that reduces the droplet size and lowers the surface tension of the water, making it wetter. Liquid concentrate dish soap is a good wetting agent if it is biodegradable, ...
Wetting agents are becoming increasingly popular. That's understandable, if you've ever worked with straight peat moss. Wetting agents are polymers added to the soil to greatly improve their water absorbing ability.
WETTING AGENT: A substance added to water that increases its ability to wet surfaces, especially those that are waxy or oily.
WHIP: A very young tree that still has a flexible trunk.
Wetting agent and water-holding polymer (optional) Lime for balancing the pH, if needed.
Lois T. Chaplin is a horticulturist and garden Writer who gardens in Birmingham, Alabama.3
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Wetting agents are essential in sandy soils. These are available in granulated or liquid form. These agents disperse through the soil directing water through to the root system.
Wetting agents. If you have a very sandy or volcanic soil the water can run through it so quickly its almost not worth watering.
You have very sandy soils in Perth, I tend to think it may be that problem called "dry patch" this can be solved by using a wetting agent. Some of the granular ones are very good, for a quick solution, use a hose on liquid wetting agent.
But tips on how to save water, and how to apply soil wetting agents to our desiccated soils, does not get to the real crux of the problem. If you have sick soil in the first place, you won't be able to fix it with this "band-aid" approach.
Because it's important to ensure a planting medium that drains rapidly, yet retains enough moisture to keep roots evenly moist, many potting soil mixes contain special wetting agents.
At best, these "wonder products" might provide some minor degree of wetting agent effect - and nothing more. Wetting agents increase spreading and penetration of liquids across surfaces and into or throughout surfaces.
Premium mixes also feature a wetting agent that helps provide more uniform water distribution in the soil. This means that the entire root mass will have water available after each watering.
The mixes also include a wetting agent (tested to be safe for plant growth) to help wet naturally water-resistant dry peat. Most mixes contain a very small amount of fertilizer, often referred to as a nutrient charge, as well.
Many potting mixes contain wetting agents, synthetic starter fertilizer and other nonorganic additives.
2,4-D should be combined with a wetting agent when applied. Because of the large number of seeds that may have been produced, repeated herbicide applications may be necessary. The frequency of application varies with the herbicide.
Unlike commercial potting soils, which are too heavy for starting seedlings, these special mixes are a combination of ingredients, usually peat, vermiculite, and perlite, perhaps with the addition of limestone and wetting agents.
Wetting agents can also help water soak through dry organic layers, like thatch, so that it moves into the soil. Compacted soils in which a vegetable or flower garden is to be planted should have organic matter incorporated into the top 6-8 inches.
 See also: Plant, Soil, Water, Gardening, Austral
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