Cal-Mag Deficiency in Dream OG (and Cannabis in General): Identification, Causes & Fixes
Cal-Mag Deficiency in Dream OG (and Cannabis in General): Identification, Causes & Fixes
Calcium (Ca) and Magnesium (Mg) deficiencies often appear together in cannabis grows — hence the popular “Cal-Mag” supplement. Dream OG (Blue Dream × OG Kush) is a relatively forgiving hybrid but can show issues in coco coir, RO water, or high-EC environments, especially during rapid growth or flowering. Early detection is key to protecting yields and bud quality.
Caption: Healthy leaf (left) vs. Cal-Mag deficient leaf (right) — note interveinal yellowing and necrotic spots.
Symptoms of Cal-Mag Deficiency
Calcium Deficiency (often affects new growth first):
- Brown/bronze/rust-colored spots or dead patches on leaves.
- Distorted or curled new growth (claw-like leaves).
- Weak stems, poor root development.
- In flower: Small or airy buds, reduced resin.
Magnesium Deficiency (usually hits older/lower leaves first):
- Interveinal chlorosis — yellowing between the veins while veins stay green.
- Leaf edges may curl upward or become crispy.
- Purple/red stems or petioles in some cases.
- Advanced: Leaves drop prematurely.
In Dream OG, you may notice symptoms mid-veg to early flower when the plant is pushing heavy growth and bud sites.
Caption: Advanced symptoms — yellowing between veins and brown spots on lower leaves.
Common Causes
- Coco coir or RO/distilled water: Naturally low in Ca/Mg.
- pH imbalance: Calcium locks out above 6.8 (soil) or 6.2 (coco); Magnesium issues below 5.5–6.0.
- High EC/salt buildup: Competing nutrients (excess K, N, or P) block uptake.
- Rapid growth phases: Dream OG’s vigorous stretch demands more Ca/Mg.
- Cold roots or poor drainage.
How to Fix It (Step-by-Step)
- Test pH & Runoff EC immediately.
- Flush (if overfed): Run 3x pot volume of pH’d water to clear salts.
-
Supplement Cal-Mag:
- Botanicare Cal-Mag or General Hydroponics CaliMagic: 1 tsp/gallon (start at ½ strength).
- Foliar spray (diluted) for quick relief on new growth.
- Adjust ongoing schedule: Add Cal-Mag to every watering in coco/RO setups. In soil, use as needed.
- Monitor new growth: Healthy green growth in 5–7 days indicates recovery.
Prevention for Dream OG:
- Use Cal-Mag proactively in coco or RO water (especially veg–mid flower).
- Maintain stable pH and moderate EC.
- Add dolomite lime to soil mixes for slow-release Ca/Mg.
- Good airflow and temps (avoid cold roots).
Caption: Proactive Cal-Mag feeding prevents deficiencies in vigorous hybrids like Dream OG.
Dream OG Specific Note: This hybrid’s dense bud structure in flower makes late-stage deficiencies costly (airy buds). Catch it early in veg for best results. Pair with your nutrient schedule — add extra Cal-Mag during heavy feeding weeks.
Cal-Mag issues are very common but highly fixable. Consistent monitoring beats chasing deficiencies.
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We keep revisiting jars, floors, and fits because cannabis culture is not a press release — it is a practice. Come back tomorrow with a clearer nose, a sharper question, and less patience for potency theater. The Stoner Review will still be here, writing like the Wi-Fi might die and the circle outside is the only network that matters.
Support independent cannabis media when the algorithm gets weird. Share the pieces that help somebody shop smarter. And when a brand tries to sand the joke off the plant, remember who was in the room first.
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