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Rosenthal

Feminised

Rosenthal is an indica-dominant hybrid that delivers resinous buds and a steady, functional high suited to varied uses.

Why choose Rosenthal?
  • Resin-heavy buds with clear terpene notes
  • Performs well indoors and under sheltered outdoor conditions
  • Stable feminised seeds for uniform grows
THC 18-22%
CBD 0.5-1.5%
Lineage Northern Lights x Haze
Genotype Indica-dominant hybrid
Difficulty Intermediate
Flowering 8-10 weeks
Height Medium, bushy
Yield Medium to high (with training)
Taste Earthy pine, Citrus zest, Sweet spice
Seed Type Feminised
Climate short outdoor growing season
Effects Relaxed, Uplifted, Focused
Environment Suitable for both indoor and outdoor with season adjustments

About Rosenthal

Rosenthal is a robust indica-dominant hybrid bred for resin production and reliable yields under attentive care. It combines Northern Lights x Haze lineage to deliver earthy pine and bright citrus notes, moderate-to-high THC, and effects that balance focus and relaxation.

Grow Difficulty:

Growing Rosenthal outdoors during a short outdoor growing season demands careful timing and proactive disease prevention. Plants benefit from early training and close attention to humidity and airflow.

Flowering Time:

Indoor flowering averages eight to ten weeks for most phenotypes of Rosenthal. Outdoor plants typically finish late in the season if the weather holds.

Yield:

Rosenthal gives a medium to high yield when trained and fed correctly. In cooler regions extra training and trim work are often needed to reach full potential.

Height:

Plants grow to a medium, bushy stature with sturdy branches suited to supporting dense buds. The structure responds well to topping and low-stress training.

Environment:

Indoors Rosenthal responds well to controlled light cycles and humidity control, producing compact, resinous buds in a modest space. Outdoors in Northumberland it needs careful placement and wind protection to avoid mould.

Climate:

Growing Rosenthal in Northumberland with a short outdoor growing season requires strict mould prevention and fast canopy control. Give extra shelter and consider early- to mid-season training to ensure buds finish before autumn rains.

Frequently Asked Questions

Common questions about this strain, covering growth, effects, and suitability for UK conditions.

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Choose seed quantity
Selected: 5 Seeds
£53.33 £40.00
£8.00 / seed • You save £13.33
Accepted payment methods
100% Satisfaction Guarantee • Secured Payments
Urbanseedbank Support

Questions & Answers

Customer questions and answers from the Urbanseedbank team. Submit your own question and we’ll respond after review.

5 questions Answered posts are shown first.
Common question Posted by Urbanseedbank Answered
Q
How soon should I start training Rosenthal outdoors?
A
Verified answer
Begin topping after three to four nodes during vegetative growth so the plant has time to recover before flowering.
Common question Posted by Urbanseedbank Answered
Q
What to do if I spot powdery mildew?
A
Verified answer
Isolate the affected plant, prune infected leaves, increase airflow and treat with an approved organic fungicide or sulphur product as recommended.
Common question Posted by Urbanseedbank Answered
Q
Can I finish Rosenthal in a greenhouse in Northumberland?
A
Verified answer
Yes, a greenhouse gives extra protection from rain and helps control humidity but still needs good ventilation and occasional heating on cold nights.
Common question Posted by Urbanseedbank Answered
Q
How often should I feed during bloom?
A
Verified answer
Feed a bloom-formulated nutrient every one to two weeks depending on medium and runoff, watching for signs of nutrient lock or salt build-up.
Common question Posted by Urbanseedbank Answered
Q
What clear signs show Rosenthal is ready to harvest?
A
Verified answer
Look for mostly cloudy trichomes with some amber caps and pistils that have darkened and curled inwards, with aroma and stickiness at peak.

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