Plant Magic - Oldtimer Organic PK 4-8


Size: 5 Litre
Sale price£107.99

Finally, an Oldtimer Organic PK Booster!

Plant Magic Plus Oldtimer PK 4-8 gives your plants the phosphorous and potassium that they need to increase weight and improve essential oil content but, unlike its competitors, it's made using certified organic materials.

Plant Magic Oldtimer products encourage beneficial microbial activity in the root-zone. This increases yield and root-health. For a really flourishing microherd we highly recommend using Ecothrive Neutralise to avoid the chlorine/chloramine in tap water from inhibiting, or even killing, the friendly microbes, plus a quality beneficial inoculant such as Ecothrive Biosys when growing in soil. For an extra kick, try Ecothrive Charge too!

How Plant Magic Plus Oldtimer PK 4-8 Works

Plant Magic Plus Oldtimer PK 4-8 works by providing concentrated levels of phosphorous and potassium at a ratio of 4:8, to manage your plant energy during the mid-late flowering period. It’s made up of organically derived nutrients which produce solid, natural results. It’s a simple formula and easy to use, which means you can have bigger harvests without having to overcomplicate things. Is also best used alongside Oldtimer Grow/Bloom.



Your choice of size of Plant Magic Plus Oldtimer PK 4-8 (choose your size above)


  • Increases flowering and fruiting rates, for bigger and better yields
  • Made in the UK using certified organic ingredients
  • Provides a much needed boost of phosphorus and potassium in the later stages of flowering
  • Naturally high levels of sucrose (BRIX) results in sweeter tasting crops
  • Delivers the best results when used alongside the rest of the Oldtimer range

How To Use

How to Use Plant Magic Plus Oldtimer PK 4-8

When using organic nutrients it is especially important to shake the bottle well before use.

Add 1-2 ml of Oldtimer PK 4-8 per litre of nutrient. Start adding it from the beginning of week 4 and finish using it when you begin the final flush.

Use it within 6 months of opening the bottle.

Plant Magic Plus Oldtimer PK 4-8 recommended dosage: 1 - 2 ml per litre

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