Flushing cannabis: How to improve the flavour and quality of your harvest

Rinsing cannabis, also known as "flushing", improves the quality, flavour and purity of your harvest. This involves rinsing the plants with clear water before harvesting to remove excess nutrients and chemical residues. This results in cleaner, better tasting Flowers that burns more evenly.

Rinse hydroponic systems 7-10 days, soil 10-14 days and coco fibre 7-10 days before harvesting. Rinsing is also important for organic fertilisers such as Biobizz so as not to impair the taste. In this article you will learn everything you need to know about flushing cannabis, including the best methods and time frames.

What is cannabis flushing?

Cannabis flushing refers to the process of watering your cannabis plants with clear water in the final weeks before harvest. The aim is to remove excess nutrients and chemical residues from the growing medium. This process is particularly important to ensure that the Flowers is pure and free of any chemical residues. It is a technique that is used in both soil and hydroponic growing methods.

Rinsing is an essential step to maximise the quality and flavour of your harvest. Here are some reasons why rinsing is done:

Improving flavour and aroma Chemical nutrients can leave an unpleasant taste and odour in your cannabis flowers. Rinsing removes these residues and gives you a cleaner, more natural product.

Better combustion Unpurged cannabis can be difficult to light and often leaves a dark ash. After purging, your cannabis will burn more evenly and leave a light grey ash.

Health benefits Consumption of cannabis with chemical residues can be harmful to health. Purging helps to minimise these risks.

Avoidance of over-fertilisation Over-fertilisation can lead to an accumulation of nutrients in the medium, which can damage the plant. Flushing helps to flush out these excess nutrients and relieve the plant.

Why should you flush cannabis?

Improving flavour and aroma Chemical nutrients can leave an unpleasant taste and odour in your cannabis flowers. Rinsing removes these residues and gives you a cleaner, more natural product.

Clean combustion Unpurged cannabis can be difficult to light and often leaves a dark ash. After purging, your cannabis will burn more evenly and leave a light grey ash.

Health benefits Consumption of cannabis with chemical residues can be harmful to health. Purging helps to minimise these risks.

When and how long should you flush cannabis?

Time frame for hydroponics When growing hydroponically, you should start flushing 7-10 days before harvesting. This method ensures that excess nutrients and salts are effectively removed from the root system, resulting in a better quality crop.

Time frame for earth When using soil as a growing medium, it is recommended to flush 10-14 days before harvest. As soil stores more nutrients than hydroponic systems, this process requires more time to ensure that all excess nutrients are washed out.

Time frame for coconut fibres If you use coco fibre as a medium, you should flush 7-10 days before harvesting. Coconut fibres have similar properties to hydroponic systems, which allows for a shorter flushing period.

Step-by-step guide to flushing cannabis

Use of clear water Make sure you use pH-adjusted water to achieve the best results. The ideal pH value is between 6.0 and 6.8. Do not use distilled water as it can leach out the plants too much.

Thorough watering Water your plants thoroughly, using twice the amount of water you normally use for irrigation. For example, if you normally use 1 litre of water per plant, irrigate them with 2 litres. This helps to flush out the nutrients effectively.

Observation of plants : You should keep a close eye on your plants during irrigation. Yellowing leaves are a sign that the plant is starting to use up its nutrient reserves. This is a normal and expected part of the flushing process.

Special features of rinsing with Biobizz

Differences to chemical fertilisers Biobizz is an organic fertiliser that consists of natural ingredients. In contrast to chemical fertilisers, Biobizz leaves less residue in the growing medium. This means that the plants absorb and process the nutrients on a natural basis, which often leads to a lower accumulation of harmful salts.

Why organic fertilisers such as Biobizz should also be flushed Despite its natural composition, it is still important to rinse Biobizz before harvesting. Organic fertilisers can also leave excess nutrients in the medium, which could affect the taste and aroma of the Flowers. Rinsing ensures that the plant can optimally develop its natural aromas and flavours.