Root and Growth Booster

Regular price$50.00
Tax included.

Rhizo agent and nitrogen booster

Startboost is a highly concentrated, all-in-one nitrogen booster, root stimulator, microbial inoculant and rooting agent that contains 6.1% nitrogen, carbon, leonardite humic and L-amino acids.

Application - Root drench and or foliar

Available Sizes

    Feed Programs

      Feeding Type & Amount

      Regular feeding
      0.25 ml per 1L

      1 ml per 1L

      Transplant root dip
      10 ml per 1L

      Foliar spray
      1 ml per 1L

      Add STARTBOOST to your reservoir every feeding during the entire vegetative phase and into the first week of flowering to assist with a healthy transition to the bloom cycle. 

      STARTBOOST, along with FASiLITOR, is a foundation product of the APTUS Premium Collection range. APTUS STARTBOOST consists of two natural ingredients: humic acid and protein hydrolysate. 

      This synergy of natural ingredients promotes increased transport of nutritional elements across plant cell membranes whilst reducing levels of toxic elements in the growing medium. STARTBOOST also provides organic nitrogen from L-amino acids for natural and initial growth. STARTBOOST is also beneficial for the propagation and root development of seeds and cuttings.

      Organic nitrogen provided by L-amino acids promotes robust vegetative growth and photosynthesis without risk of burning or overdose.

      A wide spectrum of natural L-amino acids provides beneficial stimuli to bacteria population numbers within the planting medium.

      Humic substances have a positive effect on plant physiology by influencing nutrient uptake and root system interactions within the planting medium.

      Through interactions with various compounds in the soil, countless complexes are formed from organic and mineral components. From the formation of these complexes, compounds may dissolve, mobilise and transport products throughout the medium. It is these sets of complex interactions with humic substances that provide soil health, structure and ultimately, benefit to the plant growing above.

      Powerful stimulator of tissue formation through organic nitrogen provided by protein hydrolysate.

      Natural chelator of elements present in the planting medium.

      Provider of organic nitrogen in the form of amino acids resulting from enzymatic digestion of natural materials.

      Beneficial agent for propagation of seeds and cuttings.

      L-amino acids – Product of enzymatic digestion of natural materials, provider of organic nitrogen (N), stimulant to healthy bacteria population numbers

      Humic Acid – Building block of soil structure and health, natural chelator of various elements in the planting medium

      Begin feeding with STARTBOOST (plus FASiLITOR) as soon as your plants develop initial roots and leaves. Continue feeding throughout the entire vegetative phase.

      Use a 1:1000 dilution to feed new clones or starts from seeds (1 ml per 1 litre). This is effective as a pre-soak for cloning or seed starting medium.

      During transplanting, dip the roots of the plants directly in a 1:100 mixture (10 ml per 1 litre).

      Do not keep STARTBOOST in your reservoir for more than 2 – 3 days in order to avoid organic biofilm buildup and blockage of irrigation drip lines.


      Yes, STARTBOOST can be applied by itself as a foliar spray, although adding FASiLITOR will increase the effectiveness as the mono-silicic acid particles increase the bioavailability of every element that’s mixed with it.

      Yes, STARTBOOST is an excellent nitrogen booster as it not only contains 6.1% nitrogen, it’s also chelated with Left-Turning Amino Acids which increase the bioavailability of the nitrogen.

      You can use STARTBOOST in a recirculating system but keep in mind the organic compounds will form a biofilm which increases the need for cleaning. Most APTUS growers running recirculating hydroponic systems will add STARTBOOST to their reservoir 1 day prior to replacing the feed water which eliminates the build-up of biofilm and additional cleaning. Alternatively, you may consider running our CLEAN Program.

      Note: If you’re growing in a Deep Water Culture System DO NOT add STARTBOOST to the system. Products containing organic compounds should not be used in DWC systems. For DWC growers wanting to utilise Startboost, it’s recommended as a foliar spray only.

      You can, depending on substrate and cultivation method. If you’re growing in rockwool it’s not recommended. Similarly if your grow is operating with a fertigation system, it’s not recommended to use Startboost for more than one (1) feed per week.

      While most commercial cultivators want the benefits of using bio-stimulants like Startboost or Bloomboost, their main concern is keeping their fertigation system clean and free of biofilm. For these customers we recommend using Startboost or Bloomboost for one (1) feed per week only. This provides the plant with the additional bio-stimulation desired, while ensuring the system remains clean and free of contaminants.

      You can use bio-stimulants in fertigation systems so long as it’s only once or twice per week. This practice will prevent the build-up of biofilm.

      Absolutely! Startboost is an excellent supplement for all species of plants, especially flowering and fruiting plants.

      Feed Programs


      This program is the easiest, most concentrated, low cost program on the market. The pH stability is so reliable you can mix and set your reservoir on a given day and it will read exactly the same (+- 0.05) seven days later with no adjustment in between.


      This program is the absolute gold standard of quality, flavour, oil production and shelf life. This is the program for the grower looking to produce the absolute best flower they can or any extraction artist looking to increase the quality, colour and yield of their extracts.


      Access to the OG programs that include Soil PRO and Soil BASIC.

      All of these programs are available for download.

      Faster, Healthier
      Root Development

      Thicker, Stronger

      Higher Quality
      Fruits & Flowers


      Superior Flavour

      Increased Bag