General Growing Help

Growing With Rockwool Plugs

Why We Love Rockwool Plugs

Why We Love Rockwool

Rockwool is one of favorite ways of growing anything. Rockwool originally started out in commercial growing applications, specifically with hydroponic growers. However, in recent years as home hydroponic and growing has become more popular we are seeing more and more people using Rockwool plugs.

So what is Rockwool?

Rockwool is exactly what it sounds like. Rockwool is made by taking molten rock/sand and spinning it, similar to when you make cotton candy. The end result is a dense wool like product that is inert, has no mineral, and is great at soaking up water and remaining saturated, but not too saturated.

Rockwool comes in a variety of sizes, ranging in small plugs perfect for starting seeds and propagating cuttings, all the way up large slabs which can be used for larger plants.

Why is Rockwool such a great product to use?

Rockwool is dummy proof and unlike using soil, Rockwool is almost impossible to over saturate thus increasing your chances of seed germination and reducing your chances of root rot.

Further to the above, Rockwool is super cheap and if you really wanted to you can even re-use your Rockwool plugs after your harvest.

The only downfall about Rockwool plugs is the need for frequent nutrient applications. Rockwool has no major nutrients in comparison to seed starting soil or potting mix which usually has slow releasing nutrients for up to 6 months.

How to use Rockwool

  1. Soak your Rockwool plugs for 10 to 20 min. Before you use your Rockwool plugs or slabs you will want to give them a good cleaning. This is not mandatory, but, is a good practice.
  2. Once your Rockwool plugs are cleaned place them in a hydroponic grow cup or in your growing bed. Note: I prefer to use expanded clay pellets for my growing bed.
  3. Insert your seeds or cuttings into your Rockwool plugs.
  4. Watering should be done every 4 hours, but this is dependent on the type of plants you are growing as well as other conditions such as temperature. The rule of thumb is to ensure that your grow beds water limit is slightly below the bottom of your Rockwool plug. This will ensure that the Rockwool does not wick water upwards and remain soaked 24/7.

If you choose not to grow hydroponically, you can also use your Rockwool plugs as seed and cutting starters. As long as you keep the Rockwool moist, you can fully root cuttings and start seeds. A few weeks after germination, you can place the plugs directly into a garden or soil filled container. The Rockwool is porous enough that the roots of your growing plants will slowly punch through it and into the soil.

If you ever grow lettuce you should use Rockwool plugs. You can thank us latter!  I have never had so much success growing lettuce until I stared using Rockwool plugs.

If you have any questions about this post or about using Rockwool growing products feel free to leave them in the comment section below.


Choosing The Right Cannabis Grow Medium

If you want higher yielding plants, one thing often overlooked is the type and quality of your grow medium. Choosing the right type of grow medium can have a huge effect on the health of your plants and their yields. In this article we are going to go over some great grow medium options that are both cost effective, and work very well for all plat types.

Coco Coir

Coco coir is a very common type of grow medium used for multiple types of growing applications. Coco coir is an organic and inert grow medium that is created from coconut husks. The ground coconut husks is great at retaining the perfect amount of moisture and can be used to grow establish plants, plants from cutting, and plants from seeds.

Coco coir can be used for hydroponics but is not the best option as the small fibers can clog your pumps. Coco coir is best suited for standard soil planting. What we recommend is planting your plants within the coco coir and then placing it within a well-draining soil and perlite mixture.


Rockwool has become more widely used over the past few years, and is an amazing grow medium that can be used for hydroponic growing and soil growing methods. Rockwool is made from rock. More specifically, Rockwool is made by taking molten silica based rock and spinning it. This is a rock version of cotton candy.

Rockwool is great because it is inert, it is strong, and it is very porous. These are all characteristics that you want in a great grow medium.

Rockwool comes in a variety of sizes and is reality cheap to purchase. Most growers will use the 1 inch Rockwool cubes for starting seeds, and larger cubes for cuttings and transplants.

Unlike coco coir, Rockwool can be used in hydroponic grow setups without the worry of damaging your pumps. Rockwool is best suited for flood and drain and drip hydroponics.

Expanded Clay

Expanded clay is another popular grow medium. This is very popular and can be used to grow almost anything. Expanded clay grow medium is comprised of small clay balls/pebbles that have been fired up in a kiln. The end result is a porous and light weight ball that sums up to be a great grow medium.

Expanded clay is best suited for use in expandable drip systems and deep water hydroponic systems. A great characteristic of expanded clay is that it is inert, and pH neutral. Expandable clay pellets can also be used in tandem with traditional soil growing methods. If you are growing in soil pots, simply cover the top of the pot with expanded clay pellets. The clay pellets will help retain moisture in the soil and prevent unnecessary water evaporation.

The above grow medium options are all great in their own way. If you have questions about our products, or need help with your grow setup, we are always happy to chat. Our team of grow experts can help you with any questions that you may have. Growing can be difficult, let us help!

Cannabis Terpenes - Terpenez - Herb Guys

Terpenez Terpene Booster and Oil Intensifier

When growing cannabis for medical or recreational use, a vital, yet frequently overlooked growing additive is  Terpenes. In this article we are going to be providing an overview of a new terpenes additive created by Zelda Horticulture called Terpenez Terpene Booster and Oil Intensifier.

What are Terpenes?

Terpenes (terpenoids) are aromatic metabolites that are found in almost all plants. Terpenes are primarily found in plant oils. Notwithstanding plants such as tomatoes, mangos, strawberries, etc, there are over 100 different types of terpenes produced by cannabis plants.

In simplest terms, terpenes give your plants flavour and smell. When growing different strains of cannabis, the concentrate of terpenes is what produces the distinct smell and flavor between different strains.

Higher concentrate of terpenes = better smell

Terpenes Effect on THC and CBD

Several studies have found that terpenes have a direct correlation with how cannabinoids such as THC and CBD pass through one’s body. The concentration of terpenes found within a cannabis plant works to either increase or decrease the effects of the CBD and THC cannabinoids. When the amount of cannabinoids and terpenes is balanced within a plant, you will notice a stronger effect and an overall better end-user effect.

4 Common Terpenes in Cannabis

Pinene (pine): Pinene is the most common terpene found in cannabis plants. This type of terpene has anti-inflammatory properties, and is it also found in orange peels, pine needles, basil, and parsley.

Myrcene (earthy, musky, fruity): The Myrcene terpene is often found in mangoes, thyme, lemongrass, and basil, and like the Pinene terpene, it is also one of the most commonly found terpenes in cannabis. The Myrcene terpene can compose up to 50 percent of a cannabis plant’s terpenes, and it is very common in indica strains.

Limonene (citrus): The Limonene terpene is characterized by hints of lemons, oranges, mandarins, limes, and grapefruits, just like its name suggests. The Limonene terpene has been shown to elevate mood, and relieve stress.

Common Cannabis Terpenes - Terpenez - Herb Guys

Terpenez Booster and Oil Intensifier

Terpenez is formulated from all organic matter and is designed to assist the plant with the processes associated with oil and resin production during a plants growth stages. The producer of Terpenez is a company called Solis Tek, a distinguished manufacture of growing systems including grow lights and nutrients.

What we like most about the Terpenez product is its all natural formulation. Terpenez has been formulated as a 0-0-0- product, which means that Terpenez is free of nitrogen, phosphate, and potassium. This is great because when using Terpenez you don’t have to worry about it disrupting your pH balance soil or grow solution.

In addition to producing better smelling profiles and healthier cannabis plants and flowers, the Terpenez oil infuser product is also:

  • All natural
  • Vegan Compliant
  • Can be used up to finish with positive results
  • Can be replace your existing flushing agent
  • Able to increase systemic pest resistance
  • Able to increase cannabinoid production
  • Able to decrease fungal pathogens and root borne diseases

How to Use Terpenez Booster and Oil Intensifier

When using Terpenez Terpene Booster and Oil Intensifier you can rest assure you will only increase oil and resin production, without stressing out your plant, no matter how you decide to administer. Terpenez is very easy to use and can be used throughout the grow cycle; however, most people use it as a flush prior to harvesting.

Use 1 -2ml per litre throughout the flower cycle, ideal pH range: 5.8 – 6.4

During the flush use at 2 – 3ml per litre – ideal pH range: 5.6 – 6.2

Final Thoughts

Overall, Terpenez Terpene Booster and Oil Intensifier is one of our most favorite up and coming products. It can be used by commercial growers and at home growers alike. Terpenez will result in an increase in the essential oil production of your plants, and should be part of everyone’s growing regiment. It is safe to assume that your priority is to grow cannabis that smells and tastes great, using Terpenez is a great way to achieve outstanding result in a cost effective and easy way.

To learn more about the Terpenez Terpene Booster and Oil Intensifier, click here.

If you have any questions or require assistance with any of your growing projects, we would love to hear from you. Feel free to leave us a comment in the comment section below or get in touch with us by clicking here.

Yellowing Cannabis Leaves

Yellowing Cannabis Plant Leaves: The Cause and the Fix

When you work so hard to grow your Cannabis plants there is nothing more devastating than watching them slowly wither away until they are dead. One of the most common complaints that we hear about is the yellowing of Cannabis plant leaves, and even sometimes parts of the plant stock. When yellowing is observed, there are many things that can cause this problem, and in this article we are going to explain to you how to prevent plant yellowing.

Moisture Stress

The most common issue that we see with cannabis home growers is over watering and under watering. Finding the right amount of water for your cannabis plants is a large balancing act. If your plant is yellowing, the first thing you should do is check your soil moisture level. You can do this by poking a 1in deep hole with your finger to see if the soil is damp, or by using a soil moisture reader. We recommend using a moisture reader, as they are accurate and can be found for less than 10$.

To prevent over watering and possible root rot, you should use a highly permeable soil as well as a collection dish below the pot. Over watering will cause the roots to rot or the plant to uptake too much moisture which will bloat the leaves and cause undue stress leading to yellowing.

Tip: Once the soil is dry to the touch wait 1 more day and then give your plants a deep water. Once the water pours out of the bottom of the pot, don’t water until the soil is completely dry again. This will help support strong and hardy roots.

Temperature & Light

Temperature and light can also cause yellowing cannabis plant leaves. Firstly, light is an essential pillar to growing a healthy cannabis plant. Plants grow through photosynthesis and low light will result in poor growth. When it comes down to lighting, you will want to aim for more light during the initial growth stage, and then slowly reduce the amount of light intake at the flowering/bloom stage. HPS and Full Spectrum LED Lights are always optimal for fast and health plant growth. To check out some great deals on Mars Hydro Full Spectrum Lights click HERE.

Growth Stage = 16 to 18 hours of continuous light.

Blooming & Budding Stages = 9 to 12 hours of light.

Further to the above, temperature can also cause yellowing in plants. When it is too hot or too cold leaves may change color and eventually turn brown and yellow. Typically, when leaves are yellowing, this is attributed to colder temperatures.

“Ensure that your plants are away from vents and cold drafts.”

Seeding Temperature = 20-25 Degrees Celsius

Seeding Humidity = 65 to 70%

Flowering Temperature = 18-24 Degrees Celsius

Flowering Humidity = 30 to 40%


Lastly, yellowing of your plants may also be caused by nutritional issues. Just like humans, plants also need nutrients. Nutrient deficiencies are often confirmed when the leaves are yellow, but the veins on the leaves are still green.

Many people think that adding more nutrients and especially fertilizer will make plants grow faster. This is not true and often leads to yellowing and the burning of leaves.

The most important thing for your plants is a balance in nutrition. Always follow the manufacture recommendations and do not exceed these requirements. When in doubt, always use less.

If you want well balanced nutrition for your cannabis plants check out the Terpenez Oil Intensifier. In addition to helping your plants grow better, the results from Terpenez is impressive. The flowers will be noticeably larger look healthier with Terpenez, along with a nice aroma.

To lean more about our Terpenez products, click HERE.

If you liked this article please feel free to share it with your friends. If you have any questions or need help with your plants, leave us a comments in the section below and we would be happy to help you out.