Easy Germination

Easy Germination

Cannabis Propagator

Cannabis Propagator


Zativo caters to private customers only, and does not supply commercial or industrial growers with large amounts of cannabis seeds. If we have reason to suspect that the ordered seeds are destined for growing cannabis on a larger-than-private scale, we reserve the right to dismiss that specific order. 

Top 5 Feminized Greenhouse Seeds

The Greenhouse Seed Company is certainly one of the most renowned businesses in the cannabis seed market, and responsible, for creating some of the best-performing cannabis strains the world has ever seen. Their cannabis strains won 40 High Times Cannabis Cups, 17 Highlife Cups, and many other international awards over the years clearly indicating that their seeds rank among the best. This company has continuously extended their activities by developing a feeding line, producing documentaries about the hunt for landrace strains, or launching GrowHD.tv, a video platform made for growers. Several coffeshops in Amsterdam complete their range of services and allow customers from all across the globe to taste the strains they created. Arjan, the founder of Greenhouse Seeds, started to collect genetics from landrace strains more than 25 years ago resulting in an extensive genetic database. Outstanding strains like Great White Shark, Super Silver Haze or Himalaya Gold are just a few examples of first-rate cannabis varieties that propagated out of their R+D department in Amsterdam. If you’re curious about what strains other customers of Zativo purchase, then take a look at our Top 5 ranking of the best-selling feminized strains by Greenhouse Seeds.

1. Super Critical (Greenhouse Seeds)

  • Indica-dominant
  • Big Bud x Skunk x White Widow
  • 8 weeks

Super Critical is an undefeatable champion when it comes to sales here at Zativo. It’s an indica-dominant crossing of Big Bud, Skunk, and White Widow well known for producing excessive yields and a deeply relaxing, almost narcotic, body stone. Greenhouse Seeds crossed Super Bud, a fusion of Big Bud and Skunk No.1, with White Widow, which resulted in a highly stable strain that can also be grown by novices. Indoor yields of up to 800g/m² is the maximum production potential growers can reach in 8 weeks of flowering. Super Critical is a high-efficiency strain that helps growers to achieve a gram-per-watt ratio they never thought would be possible. High yields are feasible by growing this strain in either a SoG or a ScrOG, depending on personal preference. Super Critical grows medium-tall, has the tendency to develop lots of strong branches, and can reach a critical mass of 1200g per plant when grown outdoors, assuming ideal conditions. If one strain deserves its popularity than its Super Critical by Greenhouse Seeds, not only for generously filling one curing glass after another but also for providing fast-hitting and physical effects of the strongest kind.

Read more about Super Critical (Greenhouse Seeds)

2. Ladyburn 1974 (Greenhouse Seeds)

  • Indica/Sativa
  • Jack Herer x Ice Dream
  • 9 weeks

Ladyburn 1974 is an indica-dominant crossing of Jack Herer and Ice Dream. It’s not overly surprising to see another strain with Jack Herer genetics in our Top 5 ranking of feminized strains by Greenhouse Seeds. The influence of Ice Dream intensifies the body stone that can be felt almost instantly after taking the first hits and is followed by a long-lasting high that fades away slowly. Ladyburn 1974 has a flowering period of 9 weeks and can produce indoor yields of up to 800g/m² in ideal conditions. This variety is perfectly suitable to be grown in a ScrOG and preserves a lot of Sativa characteristics inherited from Jack Herer. The genetic makeup consists of 60% Indica and 40% Sativa genetics, giving Ladyburn 1974 the suitability to be grown by beginners or experts alike. Heavy outdoor yields of up to 1000g per plant are ready for harvest in early October, and lab results showed THC levels of 21.8%. Ladyburn 1974 is a great strain to grow and understandingly a popular choice among Zativo’s customers – the level of frostiness in late flowering is ridiculous and amazingly beautiful at the same time.

Read more about Ladyburn 1974 (Greenhouse Seeds)

3. Super Lemon Haze (Greenhouse Seeds)

  • 70% sativa - 30% indica
  • Lemon Skunk x Super Silver Haze
  • 10 weeks

Super Lemon Haze won tweemaal op rij de eerste plaats in de High Times Cannabis Cup. Deze Haze hybride won haar eerste HTCC in 2008 en wederom in 2009 en dat is iets dat niet veel andere soorten hebben gepresteerd, op Super Silver Haze na, toevallig een van de basisplanten van Super Lemon Haze. Het is niet onredelijk aan te nemen dat SSH deels verantwoordelijk is voor het succes van Super Lemon Haze op deze evenementen en ook voor de populariteit onder Zativo's klanten. Super Silver Haze won drie opeenvolgende High Times Cannabis Cups op rij, maar dan wel tien jaar eerder, namelijk in 1997, 1998 en 1999. Greenhouse Seeds besloot Super Silver Haze te kruisen met Lemon Skunk, een hybride van Las Vegas Lemon Skunk en een niet bekend gemaakte Dutch Skunk variant. Lemon Skunk won ook twee belangrijke prijzen, namelijk de HighLife Cup in 2007 en de Spannabis Champions Cup in 2008. Opgeteld hebben de genen van Super Lemon Haze en de basisplanten maar liefst zeven eerste plaats overwinningen behaald! Rokers kunnen een krachtige high verwachten, goed gebalanceerd tussen lichamelijk en cerebraal en een verse mix van citroensmaken, gemend met die uitgesproken Haze smaak. Super Lemon Haze heeft een bloeiperiode van 10 weken, reageert goed op LST en de ScrOG methode en produceert tot 800g/m² in ideale omstandigheden. Onafhankelijke laboratoriumresultaten hebben torenhoge THC niveaus laten zien van maar liefst 25%!

Read more about Super Lemon Haze (Greenhouse Seeds)

4. Super Silver Haze (Greenhouse Seeds)

  • 70% sativa - 30% indica
  • Skunk x Northern Lights x Haze
  • 10-11 weeks

Super Silver Haze already helped Super Lemon Haze to climb almost all the way to the top of our sales ranking. It’s a true breeding miracle created by Shantibaba and Neville Schoenmakers while they were still working with Greenhouse Seeds back in the 1990’s. It remains one of the best sativa-dominant strains ever released and is still available in many Dutch coffeeshops today. There’s not a single strain that ever managed to win three High Times Cannabis Cups in a row expect for Super Silver Haze – epic-winning at the HTCC 1997,1998, and 1999! The great thing about Super Silver Haze is that it offers an acceptable compromise between growing a classic Haze, stabilized with about 25% Skunk, and 25% Northern Lights. These strains brought a lot of vigour into this crossing, reduced the flowering time to 10-11 weeks, and managed to increase yields substantially. Super Silver Haze produces indoor yields of up to 800g/m² and outdoor harvests of up to 1500g per plant, assuming ideal conditions and a skillful cultivator. This strain does very well in a ScrOG where growers can take full advantage of the long and strong side branches. The high starts off with a fast-hitting, strong Sativa high in which smokers may experience a brightening of colours and sharpening of sounds, but this experience slowly shifts towards a physical stone as time progresses.

Read more about Super Silver Haze (Greenhouse Seeds)

5. Jack Herer (Greenhouse Seeds)

  • 60% indica - 40% sativa
  • Haze x Red Skunk
  • 8 weeks

This exquisite cannabis strain was named after Jack Herer, cannabis activist and book author of the Emperor Wears No Clothes. Jack Herer, the strain, is another variety in our Top 5 sales ranking that won numerous awards over the years. It’s an ace up the sleeve of breeders or growers who aim for an exceptionally strong combination of cerebral, long-lasting Sativa effects and a physical stone. Zativo’s customers seem to admire these hybrid effects, which are uplifting for the mind while at the same time, promote deep relaxation throughout the entire body. The genetics of Jack Herer are usually well balanced between Sativa and Indica (50/50) and most phenotypes lean towards their Sativa heritage. Jack Herer by Greenhouse Seeds, however, is slightly indica-dominant with 60%. Indoor yields of up to 800g/m² are feasible in ideal conditions. The flowering time is completed in just 8 weeks, resulting in fat calyxes and a thick layer of frosty trichomes covering heavily swollen buds. Zativo’s customers purchase this strain over and over again helping it to rank 3rd place among our Top 5 best-selling feminized strains by Greenhouse Seeds – it’s a  gourmet strain and the non-alcoholic equivalent to champagne.

Read more about Jack Herer (Greenhouse Seeds)