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Magnum Opus Feminized Seeds

Q: What nutrient profile works in flower?

Move to a bloom formula with higher phosphorus and potassium from week 3 of flower. Keep nitrogen lower to promote bud density.

Q: When should I harvest Magnum Opus?

Harvest when trichomes are mostly cloudy with some amber for a balanced effect. Use a 30x loupe for accuracy.

Q: How long should I cure the harvest?

Dry slowly for 7 to 10 days at 16-18C and 45-55% RH, then cure in jars for 4 to 8 weeks. Burp daily the first two weeks.

Q: What training methods work best?

Use topping early, LST, and SCROG to create an even canopy and maximize bud sites.

Q: How do I prevent mold on dense buds?

Keep late-flower RH below 45%, increase airflow, and remove dense interior foliage to reduce moisture pockets.

Q: Is Magnum Opus good for extracts?

High resin production suits rosin and solvent extracts. Harvest timing balances trichome maturity and terpene retention.

Q: What pH range is ideal?

Maintain soil pH 6.2 to 6.8 or hydroponic pH 5.8 to 6.2 to ensure nutrient uptake.

Q: How aggressive is the stretch after flip?

Expect moderate stretch in the first two weeks of flower. Use low-stress training and top before flip to control vertical growth.

Q: How should I adjust feeding in late flower?

Reduce nitrogen and keep phosphorus and potassium steady. Monitor EC and avoid large feed jumps to protect terpene profiles.

Q: How stable are phenotypes?

Phenotypes stay stable for structure but vary in terpene intensity and bud density. Select mothers early for preferred traits.

Magnum Opus Feminized Seeds by Captain Seeds - Magnum Opus is an indica-dominant high-THC hybrid. It produces dense, resinous buds and a balanced euphoric-relaxing effect.

High resin yield
Balanced euphoric relax
Performs indoors outdoors

Magnum Opus delivers high THC and heavy resin production in a compact, manageable plant. You get dense cola structure suited for SCROG and topping. Growers report 8 to 10 weeks of flowering and strong indoor yields with an even canopy. The terpene profile blends diesel, sweet berry, and earthy pine, which holds up through proper slow drying and curing. Manage late-flower humidity to avoid mold and select phenotypes early for terpene intensity.

Magnum Opus Feminized Seeds Quick Facts

All the essential strain details at a glance for growers and users.

Property	Value	Description
Type	Indica-dominant hybrid	Magnum Opus is an indica-dominant hybrid with dense resinous buds.
THC Content	24-28%	Tested THC ranges from 24% to 28%.
CBD Content	0.1-1%	CBD stays low, typically between 0.1% and 1%.
Grow Difficulty	Intermediate	This strain rates intermediate and responds well to topping, SCROG, and moderate feeding.
Flowering Time	8-10	Flowering runs 8 to 10 weeks indoors and finishes in late September to October outdoors in Mediterranean climates.
Yield	High (450-600 g/m2 indoor)	Expect high yields; aggressive training and an even canopy deliver 450 to 600 g/m2 indoors.
Height	Medium-tall (100-180 cm)	Plants reach 100 to 180 cm; top early and use horizontal training to control stretch.
Environment	Indoor and outdoor	Grow indoors or outdoors; protect buds from late-season rain and manage humidity during late flower.
Effects	Euphoric, Relaxed, Creative	The high starts with a clean euphoric lift, shifts to full-body relaxation, and keeps a creative focus.
Flavor Profile	Diesel, Sweet berry, Earthy pine	A diesel-forward profile opens, followed by sweet berry notes and a dry earthy pine finish.
Genetics	Gorilla Glue x Girl Scout Cookies	Genetics read Gorilla Glue x Girl Scout Cookies.
Climate	Mediterranean	This strain thrives in warm days and cool nights; aim for stable temps and low late-season humidity.

Frequently Asked Questions

Answers to Common Questions About Growing Magnum Opus Cannabis Seeds

What nutrient profile works in flower?

When should I harvest Magnum Opus?

How long should I cure the harvest?

What training methods work best?

How do I prevent mold on dense buds?

Is Magnum Opus good for extracts?

What pH range is ideal?

How aggressive is the stretch after flip?

How should I adjust feeding in late flower?

How stable are phenotypes?

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Q: My canopy is uneven after week 3 of flower. What next?

A: Raise lower branches, add fill lights at canopy level, and use selective defoliation to balance light across bud sites.