DIY Warm white LED lamp PAR measurements, not so exciting after all!
If you read my last few posts about DIY LED lamps built using 150W warm white LED cobs (which do not require an independent driver) you might have been excited…
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Cheap DIY high power LED grow lights: Introducing the Zip-tie lamp
Make sure you also read this post, where I studied the PAR of these lamps and realized they are not as good as I thought! Several months ago I wrote…
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Potassium concentration and yields in flowering plants
From the different nutrients that are needed by plants we have known for more than 4 decades that potassium is of critical importance to flowering/fruiting plants. Potassium is one of…
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Five reasons why a dedicated hydroponic testing room is a great idea
Most commercial hydroponic setups completely lack testing environments. The most common reason for this is that commercial crops are meant to produce revenue and a testing environment means dedicating space,…
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The use of phosphites in plant culture
Plants normally get most or all of their phosphorous from inorganic phosphorus sources. Most commonly these sources are monobasic or dibasic phosphate ions (H2PO4– and HPO4-2), which are naturally formed…
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Five things you should know when mixing your own hydroponic liquid nutrients
Many hydroponic growers – especially large scale ones – can benefit greatly from mixing their own custom nutrients. Not only can this save money in the thousands of dollars per…
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Humic acids in hydroponics: What is their effect?
Plants and microorganisms affect the substrates in which they grow in many ways. If you start growing plants in an inert substrate – with nutrient applications of course – you…
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How to prevent problems with powdery mildew in hydroponic crops
One of the worst problems you can get in a hydroponic crop is mildew. Year after year I see growers lose significant amounts of production due to this disease within…
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Five important things to consider when doing foliar spraying
Foliar spraying is a true and tested way to increase yields and prevent issues in plant culture. Both soil and hydroponic growers have used foliar fertilizer applications to increase yields…
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Creating a robust pH/EC monitor for hydroponics using Atlas probes and an Arduino
A few months ago I talked about how you could build a simple sensor station for your hydroponic projects using an arduino (see here). However this small project used the…
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