Jack Herer Grow Off, Win €250 Seedsman Voucher

Welcome to our Jack Herer Grow Off! Seedsman are giving us some seeds from one of their best strains, Jack Herer.

We will collectively grow this strain, and the grower who is voted to have the best diary, will win a €250 voucher to spend as they like at Seedsman Seeds.

Seedsman have many strains to choose from, by hundreds of different breeders, from all around the world. Along with a massive variety in breeders, Seedsman also have their own range of genetics.

Seedsman are giving away free Jack Herer seeds to members of our cannabis growers forum, so you can be involved in the Jack Herer Grow Off.

There are a limited number of places for free seeds. So make sure you enter now and see if free seeds are still available. If the free places have all been taken, then you can buy Jack Herer from Seedsman, at a discounted price using our discount code and still enter the grow off.

Take a look at Seedmans Jack Herer, and you will see it is a strain you must try, if you haven’t already.

Seedsman Jack Herer

Jack Herer Grow Off, Percys grow room,

The Jack Herer strain was named in honour of the late cannabis activist, polemicist and author of the all-time classic “The Emperor Wears No Clothes”. It has become established as something of a classic marijuana strain itself, combining the out-there euphoric, cerebral effect of a pure sativa strain with the resin-producing qualities of a pure indica.

It was originally created by Sensi Seeds by crossing a Haze with a Northern Lights #5 x Shiva Skunk cross.

Due to the existence of several phenotypes, flowering may take anywhere between 50 and 70 days. THC production is high at a minimum of 18% right up to 23%.

One thing is certain, however, and that is whichever phenos develop, the high will be clear and creative with outbreaks of euphoria likely.


Jack Herer is a perfect strain for most cannabis users. It offers a good euphoric high, which will help you focus, but is also a creeper of a stone, which gradually builds up into a heavy couch lock.

The flavour is very unique, and offers a sweet tone, with a creamy smoke that you cannot really experience with many other strains.

GENETICSOriginal Haze x Red Skunk
VARIETYIndica / Sativa
YIELD350-450 gr/m2
PLANT HEIGHTup to 175 cm
GROWSGreenhouse, Indoors, Outdoors

This is a strain you will grow again and again. It is versatile and tasty, with a perfect high that can either leave you inspired, or sleepy.

Push for 10% amber trichomes, and you will bring out that special Jack Herer high. Try it now, get your free seeds by entering our Jack Herer Grow off!

Prizes For Jack Herer Grow Off

After a poll has taken place, the member with the highest amount of votes for the Best Jack Herer Grow Off Diary, will receive a voucher for

€250 at

This doesn’t mean the biggest plant with the biggest yield. We are looking for the best documented grow. Great pictures, informative posts, and regular updates.

You can do it! Claim your free seeds and have your chance at winning this awesome prize.

How to Enter Our Jack Herer Grow Off

First, you need to be a member of our Cannabis growers forum.

Sign up is free and easy, just click HERE.

Once signed up, just leave a comment on this thread, expressing your interest in the grow off.

The grow off will begin on the 1st of December 2019, and your Jack Herer seeds should be germinated in this month, to be valid for the Jack Herer Grow Off. All seeds must have been planted before 1st January 2020.

Your Jack Herer grow diary must be updated twice a week, and at least once a week with picture or video updates. Be as in depth as possible, as the best documented grow will win a huge prize!

Upon completion of the grow off, when all diaries are complete, there will be a vote for the best Jack Herer Grow Diary. Think you have what it takes to write a good diary of a legendary strain? Then enter below!

How to Get Free Jack Herer Seeds

We will have 25 packets of 3 Feminized Jack Herer from Seedsman that we can give away for free for the grow off.

Register your interest now, and let us know if you are available to join us in the grow off. A list of interested members will be compiled in the comments below.

When all entrants are gathered, if we exceed more than 25 people, then the entrants who have the most forum points will be given the free seeds.

Entry for the free Jack Herer seeds will be closed on November 11th at 23:59 GMT. This will give us time to gather all entries, and send the seeds to where they need to be in time for December 1st.

But don’t worry, if you don’t get the free seeds, you can buy 3 Jack Herer from Seedsman at a great price, and use our Percys Grow Room discount code to get them even cheaper.

Rules for the Grow Off

  • First off, you have to be a member of our cannabis growers forum, and have the necessary equipment to grow your own cannabis
  • You MUST be able to run a grow diary, with at least 2 updates every week in our cannabis grow diaries section
  • The plants must be grown to the best of your ability. No micro cup grows, or experimental grows
  • All seeds must be germinated between the dates of December 1st 2019, and 31st December 2019. All diaries must have been started before January 1st 2020, to be a valid entry in the grow off
  • Diaries need to be updated at least twice a week, with at least one update a week containing pictures, or a video, showing the progress of the grow. If this isn’t met, the diary is an invalid entry
  • You MUST run a full grow diary in the diary section of the forum
  • If you are selected for this growoff, you MUST abide by the rules above as we have been given an opportunity as a forum, something we do not wish to abuse…play fair.

    Do not sign up for this grow off if you cannot meet these conditions

How the Winner will of the Grow Off will be Decided

The valid diaries at the end of the grow off will be entered into a 14 day poll, and the members of Percys Grow Room will vote on their favourite.

After 14 days of voting, the entry with the most votes wins. In the case of a tie, a further one week poll will be open with the drawing participants going head to head.

So, do you want to sign up to our Jack Herer Grow Off? All you have to do is comment on the bottom of this thread, displaying your interest to enter.

Jack Herer really is an amazing strain to grow, and it was picked by our admin team as the strain for the grow off. If there is any strain that could be remanded for your grow room, it is Seedsman Jack Herer.

Enjoy the Grow Off

Seedsman Seeds have been very generous to give us this opportunity. We want to make sure we can return the favour by giving them as many high quality diaries as possible in return for their generosity.

If you do wish to take part in the grow off, and you recieve free seeds, we cannot stress enough how important it is to run a dairy and keep your end of the deal. If the grow is a big success, we can do another one soon afterwards, with another strain.

Good luck everyone, €250 on the line! May the best Diary win!

73 thoughts on “Jack Herer Grow Off, Win €250 Seedsman Voucher”

  1. All the addresses I have received have been passed onto seedsman, and all packages are on the way 🙂 They should be with you soon 

    If you still haven’t got your addy to my, and you wan to be in the grow off, its not too late, message me and we can get a place for you. 


  2. Ok everyone, Seedsman have asked me to collect your addresses and forward them onto seedsman so they can send the seeds directly to you. 

    Please inbox me, with your safe address, and i’ll compile the list to go to seedsman asap. 

    I want to have as many names as possible within a couple of days so we can get most entries started asap 🙂 

    Good luck everyone, youre gonna love the Jack!


  3. Posted by: @cheezy-g
    Posted by: @macky

    Crooked ass mo fockas lol. Bear in mind, only known users can vote from now on lol. So thats alot of account you need to get promoted lol. 

    Hahaha its times like this you need your real friends around you to join the forum to not only boost it but to vote for you……………….I’ve had it tho cos I’m a miserable bastard who generally hates people??

    Same as that mate…people piss me off 🙂

  4. Posted by: @macky Crooked ass mo fockas lol. Bear in mind, only known users can vote from now on lol. So thats alot of account you need to get promoted lol. 

    Hahaha its times like this you need your real friends around you to join the forum to not only boost it but to vote for you……………….I’ve had it tho cos I’m a miserable bastard who generally hates people??

  5. I’ll be starting my next grow first week of January when this ones down and xmas and new year over with 🙂 or I’d defoe look into joining,y not haha sounds like it’s going to be fun having a look through everyone’s:)

  6. Only a couple more days to let us know if you want to be in the grow off 🙂

    1.  Macky
    2. ScottishMac
    3. twisted1
    4. Zombie Nation
    5. Hart
    6. TwoGram
    7. Mossbeardmitch
    8. Cheezy-G
    9. JenK
    10. Ivean420
    11. tani59

    11 so far, last day to enter tomorrow, so get histling. Want to get it to at least 20 🙂 If timing is going to be difficult, and you might not be able to pop in december let me know. We can adjust the times by a few weeks if need be to fit you’ll in, I don’t want anyone missing out. 

  7. Not only have I got seedsman photo jack seeds I’ve just found I have seedsman Auto Jack Herer seeds in my vault ? so  even tho I’m unable to join the comp and my photo tent won’t be up and running I’ll pop one of the autos next at the same time as everyone. Might be an interesting auto/photo experiment lol ✌️

  8. Good luck on the grows lads and lasses!! And thanks seedman for the amazing prize and freebies. Wish I could take the opportunity but maybe next time. I have got some seedsman jack herer seeds so might just grow along anyway if I have my photo tent set up by then ??✌️

  9. Too funny… I just told my wife about the Jack Herer Grow Off contest, she started laughing, somehow she misunderstood what I was saying, I think she missed the word “grow”. Bwahahahah  ? 

  10. I tell ya what since I’m still at the start of my first grow i will enter based on wether we have enough entries or not lol. I feel im the least experienced so if you get 25 others its all good al try next time. But if you don’t meet the full 25 al take an entry and give it a go ??  awesome little seedsman grow off hosted by percys sweet ??

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