Blossom End Rot

Blossom End Rot, often abbreviated as BER, is a physiological disorder in cannabis as well as in other fruiting plants, where the tissue at the blossom end of the flower or developing fruit begins to decay and turns into a dark, leathery spot. This condition is commonly caused by calcium deficiency within the plant, which can be due to insufficient calcium in the soil or the plant’s inability to effectively absorb and transport calcium to where it’s needed.

Prominent in the later stages of fruit development, Blossom End Rot is not caused by a pathogen but is rather a sign of suboptimal growing conditions, particularly inconsistent water supply which interrupts the movement of calcium through the plant.

Preventing Blossom End Rot

The prevention of Blossom End Rot in cannabis cultivation pivots on ensuring a consistent and adequate water regime, maintaining a balanced soil pH for optimal nutrient uptake, and providing a sufficient amount of calcium either through the soil or via foliar sprays. Cannabis growers might also consider the use of calcium-rich amendments or supplements, while also being mindful of other nutrients that can compete with calcium absorption, such as potassium and magnesium.

Can Blood Meal Help Prevent Blossom End Rot in Plants?

Blood meal can indeed help prevent blossom end rot in plants. The benefits of blood meal include its high calcium content, which helps prevent this common issue in tomatoes, peppers, and eggplants. Sprinkling blood meal around the base of the plants can provide vital nutrients and protect against blossom end rot.

Early Detection and Intervention

Early detection and intervention are critical in managing Blossom End Rot. Cannabis growers should watch for the initial symptoms of the disorder—small, wet spots appearing at the flowering sites—as these can rapidly expand and cause significant damage to the developing blooms.

Affected areas cannot be reversed, but stabilizing the plant’s environment and correcting calcium levels can help prevent the spread to new growth. With an understanding of Blossom End Rot’s impact on cannabis plants and appropriate corrective measures, cultivators can minimize losses and ensure the healthy development of their crops.