Critical Jack
Sativa-dominant
Blimburn Seeds
Spain
18 reviews
Critical Jack by Blimburn Seeds combines two of the most productive sativa-dominant genetics in existence: the legendary Jack Herer and the high-yielding Critical+. This cross delivers the cerebral, creative high of Jack Herer with the massive yields and faster flowering time that Critical genetics are known for. It has won multiple awards and is considered one of the best sativa-dominant strains for commercial and personal cultivation.
💊 Cannabinoids
THC22%
CBD1%
✨ Effect Profile
🌡️ Terpenes
👃 Aroma & Flavor
Aroma: Sweet pine and citrus with earthy, spicy undertones and a hint of incense
SweetPineLemon
⚕️ Medical & Side Effects
May help with
Depression
Fatigue
Stress
ADHD
Possible side effects
Dry mouth
Dry eyes
Anxiety (in sensitive users)
🧬 Genetics
BreederBlimburn Seeds
OriginSpain
Parent strains
Jack Herer
Critical+
💡 Fun Facts
- Jack Herer was named after the famous cannabis activist and author of 'The Emperor Wears No Clothes'
- Critical+ was developed by Dinafem Seeds in Spain and became one of the highest-yielding photoperiod strains available
🏆 Awards
2013
Expo Cannabis Spain
— 1st Place Sativa
🌱 Growing Info
| Difficulty | Moderate |
| Flowering | 9-10 weeks |
| Outdoor harvest | Early to mid October |
| Indoor yield | 500-600g/m² |
| Outdoor yield | 600-900g per plant |
| Height | 120-160cm |
| Climate | Mediterranean |
| Seed price | ±€18 / 5 seeds (€€) |
| Price note | Award-winning sativa cross, excellent value for the quality |
Tall, vigorous sativa with long, frosty colas and a Christmas-tree structure; light green with abundant white pistils
🛒 Buy Seeds
Blimburn Seeds
★ 4.4