New cannabis Seedfinder—find your match!

By Luke Sumpter


Cannabis plants depend on an array of nutrients to create energy, facilitate growth, and form flowers. Discover the best cannabis fertilisers to keep your plants strong, healthy, and productive.

RQS Nutrients: The Best Fertilisers for Cannabis

Rhizobacter

Easy Roots Rhizobacter harnesses the power of beneficial Bacillus bacteria to boost yields, enhance cannabinoid profiles, and bolster resistance against disease. In addition, the product makes use of algae to protect the beneficial bacteria against fertiliser irritation and pH fluctuation. The algae also contains 60 essential trace minerals that eventually become accessible to the root system.

  • How To Apply Easy Roots Rhizobacter

Use Easy Roots Rhizobacter at the beginning of the growing cycle. Add it to your potting mix when filling up containers or beds. Add 1g of the supplement for every litre of soil, and give the combination a thorough mix. Finally, you can also add Easy Roots Rhizobacter as a root drench throughout the growing cycle. Mix 1g into 1 litre of water and apply every 21 days.

Compatible with:
Any other RQS cannabis fertiliser product.
Rhizobacter

Easy Roots Mycorrhiza Mix

Easy Roots Mycorrhiza Mix features several species of fungi that fuse to roots and act as an extension of the root system. They release enzymes into the soil to break down organic matter into free-form nutrients and shuttle them into plants.

  • How To Apply Easy Roots Mycorrhiza Mix

These fungi require a root system to ally with, so add Easy Roots Mycorrhiza Mix during transplanting. Make a hole in your new bed or container and add 5g of spores per plant.

Compatible with:
Easy Boost, Rhizobacter, Easy Grow, Easy Plus, Easy Bloom.
Incompatible with:
Bat Guano (high in phosphorus).
Easy Roots Mycorrhiza Mix

Bat Guano

RQS Bat Guano offers an organic source of key nutrients and enzymes. Not only does it feed cannabis plants, but it helps to keep the soil microbes thriving too.

  • How To Use RQS Bat Guano

Bat Guano serves as a versatile cannabis fertiliser. You can use it in the following ways throughout the growing cycle:

  • Soil mix: Mix RQS Bat Guano into your soil mix at the start of the growing cycle. Add 100g of Bat Guano to 15l of soil.
  • “Tea”: You can use bat guano as a root drench to deliver high levels of phosphorus straight into the soil. Mix 1 tablespoon of guano per litre of lukewarm water. Let the mix sit overnight before use, and apply it once per week.
  • Soil dressing: Apply Bat Guano directly to the soil as a dressing. Add 100g to the surface of the soil around each plant. Dig it in under the mulch and water well.
Compatible with:
Easy Boost, Rhizobacter, Easy Grow, Easy Plus.
Special considerations
Be careful when using alongside Easy Bloom, as it is high in phosphorus.
Incompatible with:
Easy Roots Mycorrhiza Mix (unless used in separate phases of growth—i.e. Easy Roots during veg and Bat Guano during bloom).
Bat Guano

Easy Boost

A single dose of Easy Boost Organic Nutrition will provide your cannabis plants with enough food for 10–12 weeks. Add this supplement to your potting mix to provide excellent levels of nitrogen, phosphorus, potassium, and magnesium.

  • How To Use Easy Boost Organic Nutrition

Simply mix Easy Boost pellets into your initial potting mix. Add 50–100g of pellets to every 20l of soil.

Compatible with:
Any other RQS cannabis fertiliser product.
Easy Boost

Easy Grow

Easy Grow features a blend of organic nitrogen, other key nutrients, and organic biostimulants that optimise growth and vitality. These tablets work hand in hand with Easy Boost to get your plants off to the best start possible.

  • How To Use Easy Grow

To nourish your plants during the vegetative phase, simply dissolve 1 Easy Grow tablet into 3–5l of water. Apply the mixture once every 7 days. You can store the solution for 7 days. After that, we suggest preparing a new Easy Grow mix.

Compatible with:
Any other RQS cannabis fertiliser product.
Easy Grow

Easy Bloom

Easy Bloom provides all of the nutrients cannabis plants need during flowering, including phosphorus, potassium, calcium, and magnesium.

  • How To Use Easy Bloom

Start using Easy Bloom Booster Tablets once your plants have started flowering. Dissolve one tablet into 5–8l of water and use the solution once every seven days. You can store this mixture for up to 10 days before making a fresh batch. Stop using Easy Bloom two weeks before harvest while you flush your flowers.

Compatible with:
Any other RQS fertiliser product appropriate for the cannabis flowering phase.
Special considerations
Watch how your plants respond when using Easy Bloom alongside Bat Guano, as both products are high in phosphorus.
Easy Bloom

Easy Plus

Easy Plus helps to prevent micronutrient deficiencies during the growing cycle. Although deficiencies in these substances are relatively rare, they can impact plant health and yields if they do set in.

  • How To Use Easy Plus

Add 1 tablet of Easy Plus to 5–8l of water. Use the formula every 10 days, and avoid using it on the same days as Easy Grow and Easy Bloom.

Compatible with:
Any other RQS cannabis fertiliser product.
Easy Plus

Thicker Flowers

Looking for a quick way to boost flower size? Thicker Flowers works as an organic liquid stimulator that improves flower development and yield. This fertiliser features high levels of phosphorus and potassium—two of the most important nutrients during the flowering period.

  • How To Use Thicker Flowers

You can start using Thicker Flowers indoors after switching your light cycle to 12 hours on and 12 hours off. When it comes to growing outdoors, or cultivating autos indoors, start applying when you notice the first signs of flowering.

You can use Thicker Flowers every day when watering. You’ll see the best results if you follow the protocol below:

  • Week 1: 0.1ml/l
  • Week 2: 0.2ml/l
  • Week 3: 0.3ml/l
  • Week 4: 0.4ml/l
  • Week 5: 0.5ml/l
  • Week 6: 0.6ml/l

Once you reach week 7, begin decreasing by 0.1ml each week, and stop applying 1–2 weeks before harvest to flush your plants.

Compatible with:
Any other RQS cannabis fertiliser product.
Special considerations
Note that using Thicker Flowers in combination with Easy Bloom and Bat Guano may lead to excess phosphorus in the soil.

Bigger Flowers

Bigger Flowers delivers a host of beneficial nutrients and growth stimulators into the soil. Although cannabis plants don’t need this formula to survive, it will help to unlock their full genetic potential, increase yields, and boost flower quality.

  • How To Use Bigger Flowers

Bigger Flowers helps plants reach their full potential throughout the entire growing cycle. During the vegetative phase, add 1ml per litre of water and apply every two days. During flowering, follow the schedule below:

  • Week 1: 0.5ml/l
  • Week 2–3: 0.8ml/l
  • Week 4: 1ml/l

Remain at a dose of 1ml per litre until you decide to flush your plants before harvest.

Sweeter Flowers

Sweeter Flowers helps to boost structural growth and development. It contains vital amino acids that serve as the building blocks to proteins, as well as potassium, which helps to regulate protein production within plants.

  • How To Use Sweeter Flowers

Start applying Sweeter Flowers during the fifth week of flowering using the schedule below:

  • Week 5: 0.4ml/l
  • Week 6: 0.7ml/l
  • Week 7: 0.8ml/l
  • Week 8: 1ml/l

Stop using Sweeter Flowers approximately two weeks before harvest to flush your plants.

Compatible with:
Any other RQS cannabis fertiliser product.

Using RQS Cannabis Fertilisers Outdoors: Royal Gorilla

Now that you’re aware of some of the best cannabis fertilisers available, it’s time to put that knowledge into action! First, we’ll show you how to use these products when growing outdoors. We’ll use Royal Gorilla as an example. If you value high-THC levels, you’ll want to try this strain as well!

April

Our growing season starts on April 18th in this example, and takes place over 26 weeks. Let’s get started!

Kick things off by germinating your seeds. Take advantage of Easy Start during this time to increase germination rates and give your seedlings the best start possible. Your seedlings will take 3–7 days to emerge from the soil. Keep them in their cells until they reach a height of 3–5cm and develop their first sets of true leaves.

May

During May, your seedlings will start to hit a growth spurt, signalling the early stage of the vegetative phase. Prepare their new home, pot them on, and watch them grow!

Prepare the potting mix into which you’ll transplant your seedlings. Grab some well-rotted homemade compost or pick up a few bags of regular potting soil. Next, add 50–100g of Easy Boost for every 20l of soil. Next, add 20g of Rhizobacter to the mix, followed by 5g of Mycorrhiza Mix. Then, mix the ingredients thoroughly. Your seedlings have almost everything they need to thrive for the next few weeks. Keep them watered and under some strong lights for at least 16 hours each day.

Using RQS Cannabis Fertilisers Outdoors: Royal Gorilla

June

By this time, you’ll see plenty of new vegetative growth beginning to emerge. With help from their allied microbes, your plants will have tapped into the initial nutrients you provided. Now, you’ll need to start feeding them again to make sure they don’t run into any deficiencies. Apply the following nutrients throughout the rest of the vegetative phase to keep your plants strong and healthy:

  • Easy Grow: Dissolve 1 tablet into 3–5l of water and apply once every 7 days.
  • Easy Plus: This fertiliser will deliver key micronutrients to help avoid any deficiencies. Add 1 tablet to 5–8l of water and apply every 10 days. Just make sure to avoid using Easy Plus on the same day you feed your plants with Easy Grow.
  • Bigger Flowers: Add 1ml of this product to every litre of water, and apply every two days to give your plants a boost with additional nutrients and growth stimulators.
  • Rhizobacter: Add another dose of Rhizobacter during early June. The original colony should be settled in by now, but it helps to add more as the root system continues to expand. Add 1g to every litre of water and apply as a root drench.

To keep things consistent, and to avoid using certain products on the same days, mark down feed days with each formula on your growing calendar.

July

Continue with the feeding regimen set out above. Cannabis plants maintain quite an even appetite during the vegetative phase. Keep feeding them, and watch your efforts pay off as luscious green fan leaves continue to form.

Add another 1g dose of Rhizobacter as a root drench during early July to spur on the colonisation of the root system and improve nutrient exchange between your plants and beneficial bacteria.

Using RQS Cannabis Fertilisers Outdoors: Royal Gorilla

August: Weeks 1–4 of Flowering

Things are about to get exciting! As the days continue to get shorter, your outdoor Royal Gorilla plants will start to flower. Cannabis plants develop a different appetite during this time, requiring more of some nutrients and less of others.

⇢ Week 1

It’s time to swap out your vegging fertilisers with food for the flowering phase. Use the following products to get the best results:

  • Bat Guano: Add a top dressing of Bat Guano. Apply 100g to each of your pots, lightly dig in, and water well. This will provide a source of phosphorus and organic matter that will break down throughout the flowering phase, feeding your plants and soil at the same time.
  • Easy Bloom: This organic fertiliser will ramp up phosphorus and potassium levels during flowering. Add 1 tablet to 5–8l of water, and use once every 7 days.
  • Easy Plus: You can continue using Easy Plus at the same dose and frequency. Just avoid using it on the same days as Easy Bloom.
  • Bigger Flowers: You’ll need to change how you apply this fertiliser during the flowering phase. During week 1 of flowering, apply 0.5ml per litre every two days.
  • Thicker Flowers: Apply 0.1ml per litre every day while watering.
  • Rhizobacter: Apply another 1g dose of Rhizobacter to improve cannabinoid production during flowering.

⇢ Week 2

Maintain Easy Bloom and Easy Plus feeding. Increase the Bigger Flowers dose to 0.8ml per litre, and increase Thicker Flowers to 0.2ml per litre.

⇢ Week 3

Apply nutrients in the same quantities as week 2 of flowering. Increase your Thicker Flowers dose to 0.3ml per litre.

⇢ Week 4

Maintain Easy Bloom and Easy Plus feedings. Increase your Bigger Flowers dose to 1ml per litre. Maintain this dose until you flush your plants before harvest. Increase your Thicker Flowers dose to 0.4ml per litre.

Using RQS Cannabis Fertilisers Outdoors: Royal Gorilla

September: Weeks 5–8 of Flowering

Your Royal Gorilla plants will continue to cruise through the flowering stage during September. Follow the regimen below to keep things budding smoothly.

⇢ Week 5

Now, you can start to include Sweeter Flowers in your feeding schedule to treat plants to additional amino acids and potassium. Start off by feeding 0.4ml per litre when watering. Increase your Thicker Flowers dose to 0.5ml per litre.

⇢ Week 6

Increase the Sweeter Flowers dose to 0.7ml per litre and the Thicker Flowers dose to 0.6ml per litre.

⇢ Week 7

Increase the Sweeter Flowers dose to 0.8ml per litre. Reduce the Thicker Flowers dose to 0.5ml per litre.

⇢ Week 8

Increase the Sweeter Flowers dose to 1ml per litre, and maintain this amount until you flush your plants. Reduce the Thicker Flowers dose to 0.4ml per litre.

October: Harvest Time and Flushing

It’s almost time to smoke the fruits of your labour! Give your plants one final feed with the following fertilisers and supplements before flushing. Feed with Easy Bloom in the same quantities. Give one final feed of Sweeter Flowers at 1ml per litre and Thicker Flowers at 0.4ml per litre. Expect to harvest your Royal Gorilla plants on October 16th. Start flushing your plants two days after the final feed on October 1st.

Using RQS Cannabis Fertilisers Outdoors: Royal Gorilla

Using RQS Fertilisers Indoors: Green Gelato Automatic

If you prefer growing indoors, we’ll now walk you through using RQS cannabis fertilisers in this setting. We’ll use Green Gelato Automatic as an example. This sativa-dominant auto offers high levels of THC, a banquet of tasty terpenes, and grows with serious speed. Use our nutrients and supplements to keep her strong, healthy, and productive. Just keep in mind that autoflowering strains require less nutrients than their photoperiod counterparts. You'll notice we've halved the nutrients below to accommodate these speedy plants.

Week 1: Germination

First things first, you need to germinate your seeds. We recommend using Easy Start to provide an optimal environment and increase germination rates. Pop your seeds into the growing medium and wait 3–7 days for them to burst through the soil.

While you wait patiently, put a potting mix together. Autos thrive in light and airy soil. The following recipe provides the perfect growing medium for these speedy plants:

  • 3 parts peat moss
  • 3 parts compost
  • 2 part perlite, pre-wet
  • 1 part vermiculite, pre-wet

Once you’ve put your potting mix together, add 50–100g of Easy Boost and 20g of Rhizobacter to every 20l of soil and give it a good mix. Then, fill up your containers.

Using RQS Fertilisers Indoors: Green Gelato Automatic

Week 2: The Vegetative Phase Begins

By now, your seedlings should stand at around 3–5cm tall and possess a couple of small true leaves. They’re getting bigger, so they need a new home. Make a hole in the middle of your containers. Add 5g of Mycorrhiza Mix into each hole to inoculate the root system with beneficial microbes. Place your seedlings into their new pots and water them in.

Week 3

Your plants are coming to the end of the vegetative phase already! During this week, give them a feed to fuel the last few days of leafy growth. Dilute 1 tablet of Easy Grow to 7–10l of water and apply it once every 7 days. You can also treat your plants to growth stimulators during this time. Add 0.5ml of Bigger Flowers to every litre of water, and apply every two days until flowering begins.

Week 4: Flowering Starts

We told you Green Gelato Auto grows fast! Welcome to the flowering stage. You’ll need to change up your nutrients as your plants become increasingly hungry for phosphorus and potassium. Use the blend below for optimal results:

  • Bat Guano: Top-dress each of your pots with 50g of Bat Guano for a phosphorus boost.
  • Easy Bloom: Add 1 tablet to 12–16l of water and use it once every 7 days throughout the flowering stage.
  • Bigger Flowers: Apply 0.25ml per litre of water every two days.
  • Thicker Flowers: Apply 0.05ml per litre every day that you water.
Using RQS Fertilisers Indoors: Green Gelato Automatic

Week 5

Your flowering plants should look vibrant right now! Make the following modifications to your feeding schedule to keep them healthy:

  • Maintain Easy Bloom as before.
  • Increase Bigger Flowers to 0.4ml per litre.
  • Increase Thicker Flowers to 0.1ml per litre.

Week 6

It’s time to give your green babies another dose of Rhizobacter to keep those roots colonised. Add 1g of powder as a root drench to each plant. Increase the Thicker Flowers dose to 0.15ml per litre.

Week 7

You’ll need to up your nutrients again a tiny bit. This final feed will help with flower formation and cannabinoid synthesis. Follow the instructions below:

  • Maintain Easy Bloom feeding as before.
  • Increase Bigger Flowers dose to 0.5ml per litre.
  • Increase Thicker Flowers dose to 0.2ml per litre.

Week 8: Flush and Harvest

The hard work is almost over! Stop all feeding at this point and flush your plants now; this way, they’ll be ready for harvest in around two weeks.

Using RQS Fertilisers Indoors: Green Gelato Automatic