Home » Shop » Feminized Seeds » Undertow

Undertow Feminized Seeds

Q: How long does Undertow take to flower indoors?

Flowering takes 8 to 9 weeks under a 12/12 light schedule.

Q: What soil pH works best?

Keep soil pH between 6.0 and 6.5 for optimal nutrient uptake.

Q: What light schedule should I use in veg?

Run 18/6 during veg and switch to 12/12 for flower.

Q: How hungry is Undertow for nutrients?

Feeds at a moderate level; raise phosphorus and potassium during weeks 3 to 6 of flower.

Q: What training methods suit Undertow?

Start low stress training early and employ SCROG or light topping to build an even canopy.

Q: Which pests are most likely?

Spider mites and powdery mildew appear if airflow and hygiene decline; keep leaves clean and air moving.

Q: When is the best time to harvest for sedation?

Harvest when trichomes show 20 to 30 percent amber for a stronger sedative effect.

Q: How should I dry and cure Undertow?

Dry 7 to 10 days at 18-21 C and 45-55 percent humidity, then cure in jars for 2 to 4 weeks.

Q: When does outdoor Undertow finish?

Expect a harvest in early October in temperate Northern Hemisphere locations; earlier in warm climates.

Q: What yield should I expect indoors?

Plan for 400-500 g per square meter with standard LED or HPS setups and proper canopy management.

Undertow Feminized Seeds by Captain Seeds - Undertow is an indica-dominant hybrid with 18-22% THC, dense resinous buds, and an 8-9 week flower.

Heavy relaxation in 8-9 weeks
Dense, resinous buds with pine and berry
Strong sleep relief for chronic pain

Undertow grows from Northern Lights x OG Kush and delivers a heavy, relaxing high. THC ranges 18-22 percent while CBD remains low. Expect earthy pine with a sweet berry finish. Flower indoors in 8-9 weeks with LST and light defoliation to build an even canopy. Yields average 400-500 g/m2 indoors and 400-600 g per plant outdoors. Best suited to Mediterranean climates and intermediate growers who manage training and feed schedules.

Undertow Feminized Seeds Quick Facts

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

Property	Value	Description
Type	Indica-dominant Hybrid	Undertow is an indica-dominant hybrid with dense, resin-coated buds.
THC Content	18-22%	THC runs between 18 and 22 percent on typical test results.
CBD Content	0.1-0.5%	CBD stays low at 0.1 to 0.5 percent.
Grow Difficulty	Intermediate	Requires intermediate skills: timely training and feed management improve outcomes.
Flowering Time	8-9	Flowering completes in 8 to 9 weeks indoors.
Yield	400-500 g/m2 indoor, 400-600 g/plant outdoor	Expect roughly 400-500 g per square meter indoors and 400-600 g per plant outdoors under good care.
Height	Medium (60-120 cm)	Plants remain medium at 60-120 cm indoors and grow taller outdoors.
Environment	Indoor/Outdoor	Performs well indoors and outdoors in a Mediterranean climate with warm days and dry nights.
Effects	Relaxation, Sedation, Euphoria	Produces deep relaxation, a heavy body sedation, and a soft euphoria late in the session.
Flavor Profile	Earthy, Pine, Sweet berry	Tastes blend earthy and pine notes with a sweet berry finish.
Genetics	Northern Lights x OG Kush	Genetics trace to Northern Lights x OG Kush.
Climate	Mediterranean	Best suited to Mediterranean climates with stable warm conditions during flower.

Frequently Asked Questions

Answers to Common Questions About Growing Undertow Cannabis Seeds

How long does Undertow take to flower indoors?

What soil pH works best?

What light schedule should I use in veg?

How hungry is Undertow for nutrients?

What training methods suit Undertow?

Which pests are most likely?

When is the best time to harvest for sedation?

How should I dry and cure Undertow?

When does outdoor Undertow finish?

What yield should I expect indoors?

Note: With our BOGO Promo, your FREE Seeds can be any strain you choose.

BEGINNER +2 FREE

3 Seeds

$36.99

+5 FREE SEEDS

5 Seeds

$59.99

+10 FREE SEEDS

10 Seeds

$104.99

+25 FREE SEEDS

25 Seeds

$219.99

Total: $36.99

Qty:

0.0 Average

Reviews ☆☆☆☆☆

0 reviews

Customer photos 0 photos available

No photos available

No reviews yet. Be the first to review this product!

Customer Questions & Answers

0 Was this helpful?

Q: My plants stretched a lot during early flower. What should I do now?

A: Add a screen, spread the colas, and support heavy buds with ties. Top earlier next run to reduce stretch.