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Why do you guys have so many products?

With growers across the globe growing different plants in different ways in different environments with different requirements, it’s important to have a diverse range to support all of that success! We recommend you research your needs and then find the right products to support your crop. We can help with suggestions if you are unsure. Our team is here to give you confidence and results with our range of options for your garden.

Can I mix Grotek products with other brands of fertilizer?

We encourage all gardeners to experiment with their own recipes for success. But caution is always a part of making a new recipe. It’s important to consider all products and do some testing to check for compatibility. A good start is to understand the purpose and hopefully ingredients of all products. Try to avoid overlapping function because this can be too much of a good thing.

Can your products “burn” my plants?

All fertilizers have the potential to harm plants when over applied. It’s important to follow directions for use as a good guideline. And remember, more is not always better. Make sure you observe your plants visually as much as possible. Corrections can be made quickly if you are monitoring your crop properly.

Does Grotek carry organic products?

Grotek products almost all have some organic ingredients. If you are looking for organic options, the Green line is a good place to search. You can filter Green Line products in our product page search function. You can also click here to get a description of the Green line products.

Can I mix Mineral nutrients with Organic ones?

Grotek was founded on the premise that organics make virtually all gardens better. We encourage our growers to try and mix in an organic product in their recipe or reach out to us for advice on something that could enhance your yields.

Do plants need different products at different stages?

Plant stages are very important as they build the structure that every yield depends on. Our product range has solutions for all plant stages. For more detailed information on plant stages and research to help you learn how to maximize your plant’s potential, click here.

Does Grotek have products that are good for flowers?

Grotek products are meant to help your plants from start to finish. Check our products page and filter by flowering additive to find products designed to boost your yield.

Do I need to use all of your products to be successful?

NO! In fact we don’t recommend you try and use all of our products together. Our range has a lot of choice. Our products are targeted to plant stages, different requirements and different gardening styles. If you need some help check in with our team for support!

How should I store my products?

Keep products sealed in the original container in a cool, dry location, out of direct sunlight. This will help extend shelf life and reduce changes to the product over time.

I found some old product is it still good to use?

Our products are stable over long periods of time to make sure growers get the best results for as long as possible. Most of our best before dates are around 3 years with the exception of biology. Most products can be used after that date but there will be a drift in the effectiveness of the product the longer it moves beyond 3 years. Anything over 3 years old should be spot tested on a few plants before use on the entire crop to make sure the efficacy is still there.

Frequently asked questions

Do I need to use R.O. water?

Reverse Osmosis water is the best option because it means you are getting pure Grotek nutrients without background noise from minerals in the water. If you can’t use R.O. water, it is still a good idea to have your water tested so you know what’s coming out of the tap.

Do I need to dechlorinate my water when I use Grotek?

Some plants have sensitivity to chlorine. Chlorine can be evaporated with 24 hours settling time (even faster with water agitation/oxygenation). If your area uses Chloramines in the drinking water, we would suggest a filter to remove it as letting water stand will not release it and it can have impacts on seed germination and plant health.

How do I mix your products?

Grotek products are all concentrates and need to be mixed with water. Never mix two Grotek products (or more) together without having them diluted in water. This can cause reactions that reduce the amount of available nutrients for your plants.

There is a difference between the label application and the feed chart, why?

The label rate is a full strength application and is a guideline to add to a general nutrient program. With our feed charts that use specifically Grotek products, we customize the rates so each product enhances the others, while not overwhelming your plants with too much nutrient. Our lab analysis and crop experience has helped guide our feed charts that use multiple Grotek products to achieve results. Remember that label rates and feed charts are just a guideline and we encourage observation and experimentation to perfect a recipe for your own garden.

What pH range do you suggest for your products?

pH range can be determined by system, media, crop and biological products used. In general, for good production in water culture you should target 5.7-5.9. In a soilless mix (peat or coco base) look to target 6.1-6.3. In soil the buffering capacity, structure and biological diversity can all impact pH and irrigation water should be targeted consider those factors and more.

Are your feed charts for indoor or outdoor use?

Our basic feed charts are built for soilless growing (peat/coco) in containers. Remember they are only a guideline for reference. Your garden might want slightly more or slightly less. Our products can also be used in water systems and outdoors in true soil.

Can I add products on top of your feed chart recommendations?

Yes! But please remember the sum of all parts is important to focus on. By adding something new, you might have to reduce something else. Check in with our team about compatibility and the products you would like to mix.

I think I added too much fertilizer, what can I do?

Reduce or remove fertilizer from your reservoir. Apply pure water to plants to try and reduce salinity in the root zone. You can check the water running out the bottom of your containers to gauge the levels around the roots. You can also consider adding Grotek Final Flush for added impact.

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Frequently asked questions

How can I find a retailer?

Check out our store locator here.

Do you guys give out samples?

We do not sample directly to growers but work with our distribution and retail partners to provide opportunities at the store level. You can also stop by our booth when we visit a local tradeshow and keep an eye on our social media for exclusive contest opportunities.

Can I buy your products from the website?

We do not sell product on our website but many of our retail partners offer online purchasing. We recommend checking out our store locator and clicking through to a retailer near you.

Can my local store get all of your products?

Our product selection can vary slightly by country but for the most part yes! If your preferred retailer is having a problem getting our products please have them reach out to us and we will find a way to get them what they need and what you as a grower want!

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