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 J.R. Peters, Inc is a family business. The company was founded in 1997 and based on 70 years experiens in the growing field. Bob Peters started his Horticultural Services Co in 1947. He tested soil for greenhouse growers and made recommendations on how to produce the best crops. His son Jack Peters is advancing the tradition of Peter’s family quality products and services. 

J.R. Peters, Inc has its own in-house testing laboratory that has been providing outstanding analytical services to the horticulture industry for over 70 years. Professional growers, horticultural products manufacturers, and university researchers throughout the world trust us to supply accurate and timely services.

J.R. Peters, Inc also produces specialty fertilizer products for other companies that demonstartes high level of production and reliability of this company.

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Prijzen Toon Alle Dagboeken

Purple Ghost Candy
24 weeks
Purple Ghost Candyresimax
Purple Ghost Candy
3y ago · 135 opmerkingen
White Widow, first grow, 2x2
22 weeks
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White Widow (fem)
4y ago · 16 opmerkingen
Seedsman: Sunset Fem 4/20 Bundle
17 weeks
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4y ago · 25 opmerkingen

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Purple Ghost Candy
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Nieuwe Dagboeken Toon Alle Dagboeken

Rotten Berries
7 weeks
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7d ago · 4 opmerkingen
Tahoe OG Kush - 12/12 Reg Grow
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Gary Payton x Jealousy
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Laatste beoordelingen Toon alle beoordelingen

RodriguesssRodriguesssNieuwkomer
Ok
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6mo ago
purple_trichomepurple_trichomeNieuwkomer
I probably used no more than a cup and a half of fertilizer. No bloom boosters or special/other fertilzers. 25 pound bag cost about 60 USD with shipping. 400 ounces/bag 15 cents/ounce 1.5 cups = 14.5 ounces x .15 = 2.17 worth of fertilizer. No joke! Don't waste your money on special/expensive fertilizer!
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1y ago
l0rcasl0rcasNieuwkomer
The Jack’s nutrient line made feeding easier due to its simplicity. With fewer products to mix, it was quick to prepare, and the scoopable measurements were far more convenient than syringes. This streamlined the process and made feeding more manageable, especially during the recovery phase. However, I can’t fully assess the impact of Jack’s nutrients on plant health, as I switched to them when the plant was already stressed. While they didn’t seem to improve things drastically, the plant didn’t suffer from them either, so they appear to be effective without being harmful.
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1y ago
Madd_RezMadd_RezMeester
Been using Jacks for almost a year. Almost from the the first few weeks, I knew I found what worked well for my tap water and environment. Finally got results I have been expecting, won't use any other base!
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1y ago
CandogCandogLeerling
All I use start to finish
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1y ago
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Sheepsblood
Sheepsblood gecommentarieerd8y ago
Ik gebruik 3.69g/gal van 5-12-26 2.45g/gal van 15-0-0 Daarnaast voeg ik 220ml Cal-Mag toe (mijn grondwater is ongeveer 70ppm, dus ik heb die CalMag nodig) Ik verander niets van begin tot eind. Zelfde sterkte de hele tijd. Mijn enige toevoeging is Terpenez en mijn spul gaat behoorlijk stinken. Geen afdekking in een zak in een zak in een zak. In mijn indoor hydroponische ebb en gro setup. Ik doe dit onder 6-315watt CMH lampen en haal bijna elke keer 5 lbs. Luchtdichte kamer met 12k aan mini-split AC en CO2 verrijkt. Ik draai twee kamers zoals deze.
Homegrown365
Homegrown365 gecommentarieerd8y ago
Groeten allemaal: Ten eerste, deze voedingsstof is kosteneffectief oftewel goedkoop. Voorheen was ik een gebruiker van House n Garden. Ik was dol op mijn resultaten. Kosten...oei!! Ik kwam JR Peters tegen terwijl ik andere kwekers volgde (mentoren DIY COBs) en zag hun resultaten. Begon JR Peters, Jacks 321 formule in coco te gebruiken. De resultaten hebben me totaal omver geblazen. Een ander pluspunt voor mij is dat ik Jacks 321 gebruik vanaf het stekken tot aan de bloei, ik water/voed allemaal vanuit dezelfde reservoir. Geen hoeveelheden meten voor vroege groei, enz. Ik bereid de reservoir voor en voed iedereen daaruit. Heb nog geen nadelige effecten gezien. Als toevoeging ben ik begonnen met het gebruik van Mammoth P. Hopelijk helpt dit.