Drying and curing cannabis: the complete process

In the jar, 58–62% relative humidity is a good curing range. Above 65%, return the buds to drying; below 55%, they are too dry.

After the cut, post-harvest handling decides the aroma, taste and quality of your harvest. This page walks you through the whole process in order, from harvesting and trimming to hanging, the right climate and curing in jars. Each step links to a detailed guide.

1. Harvest and preparation

Get everything ready before you cut: sharp, clean scissors, isopropyl alcohol for cleaning, gloves and a clean, well-ventilated workspace. You can harvest the whole plant or single branches. Whole plants dry more slowly, single branches give you more control. Cut cleanly, remove the large fan leaves and use the stems for hanging.

2. Wet trim or dry trim

Wet trimming means cutting right after harvest while the leaves still stick out. It is faster and more precise and leaves less leaf mass in the drying room. Dry trimming means drying first and fine trimming afterwards, so fresh buds are handled less, but the trim takes longer. Wet trim suits high humidity, lots of leaf mass or limited space. Dry trim suits a stable drying room and smaller batches handled gently. With either method, large fan leaves almost always come off early.

3. Pre-trimming and hanging

A middle way is a light pre-trim. Right after the cut, remove large, water-rich or dead fan leaves and any leaves lying tight on dense buds. Resinous sugar leaves stay on for now and protect the surface during the first days. Then hang the branches upside down by the stem, sorted by thickness and size beforehand. Buds must not touch walls, the floor or other branches, and leave visible space between branches. Hang heavy colas on their own or shorten them. Check at least once a day during the first days that nothing has shifted.

Read more: Dry pre-trimming before hanging →

4. The right conditions

Aim for 18 to 22 °C and 60 % relative humidity. Moisture then evaporates slowly and the terpenes are preserved. Air should move evenly through the room but never blow directly onto the buds, or they dry too fast. A hygrometer and a thermometer show you the values, and a dehumidifier helps keep humidity steady. On average, drying takes 10 to 14 days, depending on the environment and bud size.

5. Dry in the dark

After harvest, light can put extra strain on cannabinoids and terpenes. Do not harvest in direct sun, and do not leave cut branches lying out in bright light. Dry in a darkened room, switch lights on only briefly for checks and cover windows. Light protection does not replace a good climate, it comes on top.

6. Drying in a basement

Basements are often dark, cool and stable, but they come with typical risks: high base humidity, still air and cold zones along walls and floors. A musty basement is not a drying room. Choose the most stable area, not the coldest corner, and never hang material against cold walls or close to the floor. Measure temperature and humidity in several spots, and if it is too humid, use a dehumidifier and more spacing. The targets are the same as in section 4.

7. Reading the smell

A slight hay or grassy smell during the first days is often normal, because breakdown processes are still running in the flowers. If it stays strong after drying and does not improve in the jar, drying was usually too fast or too warm. A musty, rotten or ammonia smell is not hay, it is a warning sign of too much residual moisture. If the hay note is mild, do not rush in. Keep the climate stable.

8. Measure, don't guess

Sensors for humidity, temperature and light record continuously and show you the trend, so you can react early to swings and compare harvests next time. Before storing, check residual moisture: feel the surface, test thin side stems and gently open a medium bud. If thin stems snap with a light crack, that is often a good point for the transition. If the core is still wet, keep drying. A small hygrometer in the jar is the safest method.

9. Curing in jars

When buds feel dry on the outside and thin stems snap rather than just bend, they are ready for the jar. Fill jars loosely and not too full. Open them regularly at the start to let air in (burping). To measure, fill a clean jar loosely to about 70 to 75 %, put a small hygrometer inside and read it after a few hours. About 58 to 62 % relative humidity is a good range for curing. Above 65 % the buds are still too moist and go back to drying, below 55 % they are rather too dry for a good cure. Keep jars cool and dark, and store clear jars in a cupboard or a light-proof box. Check them regularly during the first days, and react right away if humidity rises. The goal is not more fast drying but slow moisture balancing and a more stable aroma.

10. Common mistakes

Buds hang too close or touch, which creates moisture pockets.
Fresh branches are stacked or laid flat, which causes pressure marks.
Pre-trimming too aggressively makes buds dry too fast on the outside.
Tearing at leaves damages flowers and trichomes.
Drying in a basement without measuring is guesswork.
Walls and corners often have the worst microclimate.
Over-dehumidifying speeds up drying unnecessarily and can cost aroma.

11. FAQ

What matters when drying cannabis?

Stable conditions and patience. On average drying takes 10 to 14 days, depending on the environment and bud size, so check progress regularly.

Which temperature and humidity do I need for drying?

18 to 22 °C and 60 % relative humidity, with even airflow that never hits the buds directly, in a dark room.

Wet trim or dry trim, which is better?

Neither is better in general, it depends on your conditions. Wet trim is more practical with high humidity, lots of leaf mass and little space. Dry trim is better if you want to handle fresh buds as little as possible and dry more slowly.

Why do my buds smell like hay while drying?

During the first days, chlorophyll and plant residues are still breaking down, so a slight hay smell is often normal. If it persists, drying was usually too fast or too warm. Musty or ammonia smells are a warning sign.

How do I know my buds are ready for the jar?

The surface is dry but not dusty, thin stems snap with a light crack, and the core is only slightly moist, not wet. A hygrometer in the jar is the safest check.

Can I dry in a basement?

Yes, if it is dry enough, clean and controllable, and does not smell musty. Measure temperature and humidity and keep air moving indirectly.

What is curing and what matters most?

Curing means storing dried buds in jars so moisture spreads slowly through the flower and the aroma stabilises. Open the jars regularly at the start. About 58 to 62 % relative humidity inside the jar is a good range. What matters is that the values stay stable and that you check regularly during the first days.

12. From real grows

See how other growers dry and cure in these public grow diaries.