Auto Ultimate home grown cannabis

Review with HPS lights and soil

Auto Ultimate has been regarded as one of the Dutch Passion autos with the heaviest harvests.  Repeat growers also love the strong, long lasting high which combines a strong body stone with a  euphoric happy high.  Auto Ultimate is easy to grow, and under strong light she will grow unusually fat blooms very quickly. 

Auto Ultimate is most often grown under 20 hours of daily light, and with optimum conditions she will grow tall with a heavy central bloom and 10-15 good sized peripheral blooms.  Auto Ultimate grows well in soil, coco, hydroponics or any type of grow method.  Its one of our heaviest yielding varieties, the photoperiod version is called The Ultimate and is also an XXL yielder.

600W HPS

In this grow ‘TDam’ used 600W HPS lights with standard reflectors in a 2.5m x 2.5m grow area.  The plants were grown in square 15 litre containers of Gold Label Special Mix substrate soil.  Nutrients were Gold label Base A and B,  Gold Label Roots, with Ultra PK boost.


In addition, some extra nutrients were used from Advanced nutrients : Big Bud, Bud Candy and Rhino skin.  The plants were given between 1.5 to 3 litres of water each day, 2 litres a day was a typical amount.  The original grow review is here on the Autoflower Network.

Auto Ultimate grows steadily, female pre-flowers start to form around week 3-4.  This variety often accelerates her vertical growth during weeks 4-7.  Abundant bud production occurs particularly during weeks 7-10 and she is often ready to harvest around 10-11 weeks after germination.  

Tall central bloom

Auto Ultimate also often continues to creep slowly taller during the later weeks of bloom, sometimes she will approach 2 metres tall under optimum conditions.  The tall central bloom will often need supporting and can lean over especially in taller plants.  In soil-grown marijuana plants a central support cane is often a good idea, but insert the cane while the plant is young to avoid damaging the root system.  

Auto Ultimate delivers extra thick blooms

This variety grows unusually heavy blooms, if you are new to this variety you may notice how she delivers extra thick blooms and heavier harvests compared to your normal variety.  Occasionally this variety will produce long blooming phenotypes which never seem to want to stop blooming.  If you have the time, you may be able to allow the plants an extra week or two in your grow room and she will repay you with impressive results.  Auto Ultimate may have unusually heavy harvests but she is also a seriously strong variety with THC rich dense buds and a fruity/fuel aroma.  Many repeat growers select Auto Ultimate purely for the strength of the vape/smoke.  


Outdoors this plant also delivers great results especially in warm sheltered and sunny grow locations with good quality moist soil.  In cold outdoor climates give her a couple of weeks of 24-hour indoor light before putting her out.  


But indoors, as the pictures show, Auto Ultimate can give excellent results in good conditions.  Here simple 15 litre square containers with soil were used.  These were hand watered with around 2 litres (sometimes more) of nutrient feed solution each day.  Although many home growers like the benefits of growing with LED growlight, this grow shows that a standard 600W HPS grow light will deliver great results with good genetics.

Auto Ultimate also gives good results when growers have the time to tie her down with garden cord using low stress training (LST) techniques.  For growers working in small spaces, efficiency and harvests can be maximised if the growing buds are all kept at the same optimum distance from the grow light.  A screen of green (SCRoG) grow system is another way of optimising grow room efficiency and a heavy yielding vigorous variety like Auto Ultimate is well suited to it.

Great looking plants

TDam finished the grow with some great looking plants, some almost collapsing under the weight of their own buds.  

Whether you are growing recreational or medical cannabis, you should try Auto Ultimate for yourself and see how much your grow room harvests can increase by.  Its an easy and forgiving variety to grow, and its a variety that really delivers under intense lights.  Whether you are a first time cannabis grower or a more experienced grower, Auto Ultimate will surprise you, get your feminized seeds here.


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