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Seaweed extracts in plant cultivation

Seaweed extracts in plant cultivation

Seaweed extracts in plant cultivation research show that the application of seaweed extracts in plant cultivation exhibits positive effect on cultivated plants. Algae extracts improve plant resistance to frost and drought and increase crop yields. Plants sprayed with the use of seaweed extracts are also characterized by higher resistance to pests and pathogens and more efficient consumption of nutrients from soil.

Seaweed extracts contribute to the recovery of damages caused by insects and bacterial or fungal diseases. Formulations basing on algal extracts are rich in phytohormones (gibberelins, auxins, cytikinins), amino acids and fatty acids which are responsible for plant growth, development and resistance to pathogens.

Biostimulant activity of extracts obtained from marine algae is connected with the presence of plant growth regulators, particularly cytokinins mainly responsible for plant aging delay, mitosis induction, stimulation of chloroplast maturation, growth of shoot and lateral buds. The amount of cytokinins changes and their ratio to other plant growth hormones depends on the species of algae resulting in different effects of seaweed extracts on plant cultivation.

Seaweed extracts can be delivered to plants in many ways. Soaking of seeds in algal extracts is one of the methods. This way of treatment can effect seeds germination. Foliar and classical soil application can be used as well. In addition to application methods, also the concentration of seaweed extract, species of algae, plant variety affects the efficiency of seaweed extracts as plant biostimulants.

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How does salt water affect plant growth 2020

How does salt water affect plant growth? It’s not salt which is the problem, it’s too much salt. All living things on Earth need some salt. But too much salt is poisonous to plants, just as it is to animals, such as ourselves. The presence of too much salt impacts the plant’s appearance, hydration, and growth. Thus saltwater affects plant growth.

When there is too much salt in the soil, which happens if it is regularly flooded with seawater or saltwater or if poor land management leads to salinization. Soil can also become salty due to the excessive use of chemical fertilizer.

Saltwater negatively affects plant growth by dehydrating them. Plants observe water via their root system through osmosis. However, these highly-permeable root cells work in the opposite direction when the soil has a high salt content. This means the salt in the soil can actually pull water out of the cells and dehydrate the plant.

This excess salt interferes with the chemical reactions in cells which the plant needs to make food and to grow. As a result, the plant’s growth is stunted and the plant may even die.


Osmosis is the procedure in which water absorption through semi-permeable membranes happens at high concentration levels.

Semi-permeable membranes pertain to tissues found in the plant roots; from there, water will be transported to an area with much lower concentration levels.

Freshwater, along with vitamins and minerals found in the soil, flow freely to the roots and up to the stem, leaves, and other parts of the plants distributing the nutrients effectively.

When salt is present in the water, it tends to play tug of war with the roots. The roots pull in the available water while the salt pulls out the water. After regular exposure to too much sodium, plants will shrivel and die.

How nutritional imbalance effects plant growth

While most living things need some salt, too much of it can be toxic. This is true in plants, although some can withstand sodium and are more salt-tolerant than others are.

Salt is a nutrient that can be absorbed by the plant. When an accumulation of sodium happens, it can severely alter the chemical composition, thus resulting in nutritional imbalance.

How dehydration effects plant growth

As we have discussed how osmosis works, sodium can have a negative impact on plants, sometimes confusing the caregiver.

The plant life affected with an over-abundance of saline will have indications of drought (wilted brown/yellow leaves); yet, water will be obviously present in the soil.

Even if the soil is damp, the plant cannot absorb the required water and nutrients due to the saline present, which is pulling the moisture from the roots, thus leading to dehydration.

How underdevelopment effects plant growth

When plants are exposed to too much salty water, they have a hard time completing the osmosis process. They spend too much energy playing tug of war with the salt, pulling in as much water as they can – in short, they have to fight for moisture.

Because of this, they put in lesser energy into making leaves formation and flowering; as a result, they may not produce or grow as well.

Can plants be watered with salt water?

Generally speaking, most plants can tolerate saltwater on their leaves and stems to an extent, but they will dehydrate if they drink saltwater from the soil. In some cases, plants may be poisoned by an excess of salt in their systems. The important thing to note is to avoid watering your plants with salt water if you want them to thrive because saltwater affects plant growth.

How much salt will kill a plant?

Generally speaking mix 1 cup of rock salt with 2 cups of water. Add it to a spray bottle or pour it directly over the plants you want to kill. Please use boiling water to dissolve the rock salt and kill the plants.

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How to use Seaweed Fertilizer in Container Gardening in 2020

In this article, we are going to talk about how to use seaweed fertilizer in container gardening for the best success. If you are into container gardening or you wish to start container gardening you need seaweed fertilizer in container gardening. You can use organic fertilizer or chemical fertilizer. When it comes to using organic fertilizer in container gardening. You have two options; granular organic fertilizer or liquid organic fertilizer. For this reason, the use of seaweed fertilizer in container gardening is easy.

Table of contents

Liquid organic fertilizers for container gardening

Liquid organic fertilizers are easily absorbed into the plants through either roots or leaf.

To put more simply nutrients available in liquid organic fertilizers used in container gardening are more readily and rapidly available to plants. As a result, if you want to increase yields, improve plant growth, and vigor in your container gardening, you should use liquid organic fertilizer. Because liquid organic fertilizer contains nutrients necessary for such actions.

However, not all liquid organic fertilizers available online are equal in quality or has the necessary nutrients for better yields and overall plant growth

At the same time, liquid organic fertilizer for container gardening contains many different trace nutrients, vitamins, amino acids, and plant growth hormones. Each of these plant nutrients plays a vital role in the health and vigour of the plant.

There are many different types of liquid organic fertilizers available online for container gardening. You can also make your own. However, here is what we recommend to be used in container gardening.

Liquid seaweed fertilizer

Liquid seaweed fertilizer is also organic seaweed fertilizer, considering seaweed is organic.

Seaweed fertilizer is a great liquid fertilizer for plants and it is different from most N P K organic liquid fertilizer. in fact, liquid seaweed fertilizer contains many different types of minerals, vitamins, and enzymes that are essential to natural plant growth.

Furthermore, many of these organic plant nutrients are not found elsewhere. These organic nutrients help in healthier, stronger, and disease-free plants.

If you are using liquid seaweed fertilizer you should see your plants taking more nutrients from the soil, becoming more resistant to frost and other stress conditions, increase in resistance to the pest.

As a result, if you use liquid seaweed fertilizer your plants will be healthier, stronger, and more resistant to disease and pests.
Best of all, increase in yields.

Is seaweed fertilizer good for all plants?

Seaweed fertilizer is good for all plants because it contains all most all macro and micronutrients in variable quantities. The properties of seaweed fertilizer are well suited for container gardening as it contains a nice balance of nutrients that you can add to your existing potting soil when planting for the first time and also use it as regular feeding.

Furthermore, Seaweed fertilizer is more of a tonic, due to the low quantity of nitrogen and phosphorus… although it does have the full range of organic macro and micronutrients in it to improve your soil.

Seaweed fertilizer contains around 60 trace elements, growth hormones and nutrients, and fungal and disease preventatives.

As a result any soil imbalances, such as a deficiency of nitrogen, will be corrected by adding seaweed fertilizer which will balance the soil environment so that nitrogen-fixing bacteria are helped along.

What nutrients does seaweed fertilizer have for container gardening plants?

Seaweed fertilizer contains several useful plant nutrients, including nitrogen, potassium, phosphate, magnesium, and 63 macronutrients including many different types of vitamins.

Anyone who has done container gardening for long knows that plants planted in this away have a different need for watering and fertilizer than plants grown in the ground.  

Since most plant roots don’t like to be wet or bone dry, the container gardener must take care to add water on a timely basis. Generally speaking, if you are using Seaweed fertilizer in container gardening you don’t have to worry about overdose.

Organic liquid fertilizer such as seaweed fertilizer has no side effect on the plants due to overdose.

How often should I fertilize my container plants?

Container plants don’t like their roots to be wet or completely dry all the time. Keeping this in mind you should water your container plants on a timely basis so that the roots are neither wet nor completely dry all the time.

It is essential to add Seaweed fertilizer to the watering liquid from time to time to replace the depleted minerals and enzymes in the potting soil. Liquid seaweed fertilizer is a natural form of plant supplement and must-have for any into container gardening. Be sure to follow label instructions before applying.

We recommend using Seaweed fertilizer in container gardening.

Can you use too much seaweed fertilizer in container gardening?

Seaweed fertilizer contains all most all macro and micronutrients needed by a plant in variable quantities hence using too much seaweed fertilizer on purpose is not needed. Please read the product label before using it.

What is the best seaweed fertilizer for container gardening?

Generally speaking not all seaweed fertilizers available online in amazon or Flipkart are always not the best seaweed fertilizer. Customers have reported many counterfeit products too. I highly recommend the use of best quality seaweed fertilizer, whether you’re growing in containers or in the ground. A good quality seaweed fertilizer should contain micronutrients, be completely natural, should be sustainable and harm-free to the soil microbes.

Furthermore, I prefer the calcified version of seaweed liquid fertilizer that can be mixed into the top few inches of a pot, and which breaks down over time, but there are lots of other alternatives. Many gardeners favor the liquid seaweed version.

Brand nameImagePriceRatings
Saosis SEAWEED Rs. 1489/10
Seedsnpots Rs. 2298/10
OrganicDews Rs. 2258/10
Generally speaking

To know more about Seaweed please continue reading here