Control coco flush correctly before harvesting

## Introduction

In **coco cultivation**, the pre-harvest flush differs significantly from soil. Coco only stores nutrients to a limited extent, reacts quickly to changes and is usually watered **frequently to daily** in the final phase. This is precisely why a harvest flush in coco must be **controlled and rather short**. The aim is not to "starve" the plant, but to relieve the root area of excess salts and allow the plant to run cleanly until harvest.

This guide deals **exclusively with the harvest phase**: the flush immediately before the cut, the runoff control and the direct transition to **drying and curing**.

## When to start the flush in Coco

The flush in Coco usually starts **shortly before harvest**, usually around **3 to 7 days** before the planned cut. Longer periods are often unnecessary in Coco because the medium buffers little and the nutrient situation changes quickly.

When starting, do not follow a rigid calendar, but rather **ripening signs**:

- **predominantly milky trichomes** as the main signal

- first **amber-colored trichomes** if a more mature effect profile is desired

- pestles only as a secondary signal, as they are less reliable

Important: In Coco, the flush should **not be started too early**. Because Coco reacts quickly, premature withdrawal tends to lead to unnecessary loss of quality and yield in the last few days.

## How to flush correctly in Coco

For flushing, use **pH-corrected water or a very weak final solution** with a target pH of **5.8 to 6.0**. This range also remains suitable for Coco in the harvest phase.

### Basic rules for the Coco flush

- Continue to water at the frequency typical for Coco, i.e. **regularly to daily**, instead of allowing the medium to dry out.

- Work with **sufficient runoff** so that dissolved salts are actually rinsed out of the pot.

- Coco must not be allowed to dry out too much in the last few days, as this can increase the salt concentration in the root zone.

### EC control in the runoff

The most important measured value when flushing in coco is the **EC of the drain/runoff**.

In practical terms, this means

- Measure the **EC of the input solution**.

- Then measure the **EC of the runoff**.

- The runoff EC should **decrease significantly** in the course of the flush.

An exact target value depends on the initial state, but can be used as a guide:

- a clearly falling runoff EC shows that salt residues are being flushed out

- if the runoff is still well above the input solution, further controlled rinsing is advisable

- extremely aggressive rinsing quantities in a single pass are usually unnecessary; in Coco, a **uniform, repeated flush** is often cleaner

## Calcium and magnesium in the final phase

Coco binds calcium and magnesium more strongly than many other media. This is why **CalMag** is always an important point in coco cultivation. In the direct flush phase shortly before harvest, however, the focus is no longer on correcting deficiencies, but on a clean finish.

If you work with a **very weak solution** instead of pure water in the last few days, minimal stabilization can be useful. However, a full nutrient plan no longer belongs in this phase. It is crucial not to burden the root zone with new salt loads**.

## How to recognize that the flush is sufficient

A successful coco flush can be recognized by several factors:

- the **Runoff-EC drops noticeably**

- the plant visibly enters its natural final maturity

- no further strong nutrient enrichment in the pot

- the planned harvest time based on the trichomes has been reached

Avoid the mistake of extending the flush unnecessarily. In Coco, a flush that is too long rarely brings advantages.

## Pruning after the flush

Harvest as soon as the desired degree of ripeness is reached. Cut the plant or individual branches with **clean, sharp tools**. Then the flowers are **no longer watered**. The post-harvest treatment begins at this point.

## Directly after the harvest: drying

Hang whole branches or suitably portioned twigs in a dark room:

- **18 to 22 °C**

- **approx. 60 % relative humidity**

- gentle air movement, but **no direct airflow onto the buds**

Drying usually takes **10 to 14 days**. The aim is a slow, even release of moisture.

## Curing after drying

After drying, the buds are placed in clean, airtight jars. Open them regularly during the first few days for **burping** to allow residual moisture to escape. Ensure a stable range of around **58 to 62 % glass moisture**. Curing improves the aroma, smoking behavior and overall quality over several weeks.

## Conclusion

In **coco cultivation**, the pre-harvest flush is a **short, controlled salt reduction** and not a long starvation. The decisive factors are **pH 5.8-6.0**, regular irrigation with runoff, observation of the **runoff EC** and a precise transition to **harvesting, drying and curing**.

## Pro Tips

- In Coco Flush usually only plan 3-7 days.

- Runoff-EC is more important than rigid calendar days.

- Never allow the coco to dry out completely in the final phase.

- After cutting, buds are dried, never watered.

- Dry slowly at 18-22 °C and 60 % RH.