We all know of the benefits that autoflower seeds can offer cannabis growers. It can be difficult to select a strain to grow which is high in THC, so we thought we’d offer two recommendations to make the decision process easier for you.

Cinderella Jack

This strain may sound cute and cuddly, but it certainly packs a psychoactive punch! This is one of the strains that contains a very high concentration of THC. This strain is an auto variety which is produced from Buddha Seeds, who are auto breeders from sunny Spain. The genetics for Cinderella Jack were specifically selected based on the levels of THC rather than anything else. During the breeding process, use was made of laboratory tests and analysis to ensure that at each different stage of the breeding process that the THC concentrations were still at the high levels they wanted to achieve from the strain. They made Cinderella Jack by crossing Jack Herer and Cinderella 99. The yields during harvest are quite a bit above average for this strain in thanks due to the genetics from the Magnum genetic line. You should expect THC concentrations to reach upwards of 20%, making the strain arguably one of the most potent autos on the market at the moment.

Auto Xtreme

If you are looking for THC concentrations that are not quite as high as Cinderella Jack, Auto Xtreme from Dutch Passion may be your port of call. The genetics of Auto Xtreme are from the OutLaw strain, which was a cross between Amnesia and Super Haze. This has been carefully adapted into an auto feminized variety to produce a unique Sativa Haze which generates excellent yields.

You can expect to harvest your Auto Xtreme yield after around 85 days, but of course this can vary by a few days above and below this number. You will notice that this is slightly longer than other auto feminized strains, but this extra growing time enables the strain to deliver a high THC concentration, with an excellent taste and yield. It should be expected that the plants of Auto Xtreme will be quite tall – sometimes up to over a metre and a half in height!

Seeds for both Cinderella Jack and Auto Xtreme can be bought on Anubis Seeds, which are a renowned seed supplier in the UK. Other high THC concentration strains to consider include Blue Kush and Critical +. Got your own recommendations for strains that have a high THC concentration? Let us know!