Rockwool is hands-down the ultimate growing medium for germinating and raising seedlings due to its high aeration and good water retention properties. It's easy to use and hard to fail with! Rockwool is the product of molten rock which has been spun around at high heat (similar to fairy floss). The result is a light material with thousands of tiny cavities that help store water and air.
Perlite is a growing medium with thousands of tiny air pockets which give your plants the aeration boost that they need! It is a naturally occurring mineral that forms when obsidian is heated to extreme temperatures and then cooled very quickly. The rapid cooling forces out the moisture in the material and leaving a porous surface in the medium. This results in a very light weight substrate that has great aeration properties - making it a great choice for hydroponic and soil based growing.
Vermiculite is a super water absorbent growing medium which evenly distributes water using capillary action! You can think of vermiculite as being the gardening version of a sponge. Vermiculite is a naturally occurring mineral which expands when heated to high temperatures - forming layered and absorbent strands
One of the easiest and most popular growing mediums out there, expanded clay (sometimes referred to as LECA) is an inert, reusable and pH neutral growing medium which is commonly used for indoor plants, and hydroponic growing systems. Importantly, it is clean and easy to handle.
There are a range of different types of horticultural lights. Over the last decade the industry has moved toward LED grow lights as they are efficient, low maintenance, can be easily controlled, and have come down in cost dramatically over time. For this reason, all Urban Plant Growers grow lights use LEDs.
Plants primarily require blue and red light between the 400-500 and 600-700nm wavelengths. Other portions of the light spectra are not always utilised by the plants! Which is why if you got a household light globe, it COULD grow a plant, but most likely wouldn't, as most of the light spectrum emitted is wasted by emitting light at the wrong wavelength.
Hydroponics refers to growing plants without soil. Hydroponic nutrients give plants everything they need to grow, so that you can grow plants without soil. In this section we'll cover what nutrients plants need to grow, how much nutrients they need, how you can measure nutrients, and what other factors you should consider when starting a hydroponic garden.
Hydroponics refers to growing plants in water. its typically also associated with LED grow lights, hydroponic nutrients, and growing mediums. There are a range of awesome reasons why you should be growing food and plants hydroponically!