With so many factors to consider, like substrate, lighting, and fertilizer sprays, how close or far apart you space your hydroponic plants may not even be on your priority list. Maybe you figured you would just space the plants in whatever arrangement fit the number of specimens you want in the room you have available. You didn’t think you could just wing it did you? Check out the real reasons why plant spacing matters.
Maximize your harvest
Okay, this may seem like common sense, but if you are planning to harvest the products at the end of your plants’ grow cycles, then it pays to fit as many plants into the space as possible without sacrificing the quality or quantity of the harvest. When you are planning how many specimens to put in an area, remember to allow room for growth. Plants that produce a harvest can grow up to fifty percent larger during flowering.
You also want to make sure that wherever you have your hydroponic setup, you leave space in the room for you to move around in order to inspect and care for the plants. The health and quality of your plants will suffer if you can’t reach them or monitor them. This is important when you need to apply fertilizer or fix your lighting or water source. About twenty-five percent of your canopy space will need to be used for walking areas and equipment. All of the other reasons explained here also affect harvest quality and quantity in some way.
Fully utilize lighting resources
When it comes to the space between actual plant specimens, you may feel tempted to put a lot of space in between to make sure each plant has lots of room to grow. But this can be a wasteful plan. The further apart you place each plant, the more of your lighting that is providing high levels of light to the floor instead of to a plant.
And lighting sources can be expensive. In addition to the cost of purchasing and repairing your grow lights, you also pay a significant amount of money on electricity and cooling systems to maintain proper light and temperature levels in your grow room.
Avoid underdeveloped buds
Of course, if you put the plants too close together, you end up with their leaves shading each other, and that can compromise development of a flowering plant. You want to maximize your harvest, remember? That means you want all of those buds to be reached by the light through the canopy.
Prevent mold and mildew
Mold and mildew growth is another result of plants being spaced too closely. The overlapping leaves can trap moisture and reduce ventilation between plants. If mold takes hold, it can spread quickly and deteriorate your plants and their harvest.
It may take a bit of trial and error, but you should be able to reach a point where your plants are spaced neither too close nor too far apart. In this way, plants are easily reachable, maximize your resources, and produce the best harvest possible. Talk to our hydroponics experts at Indoor Cultivator for more indoor plant spacing and growth tips.
Frequently Asked Questions
Why is plant spacing important?
Proper spacing ensures each plant gets adequate light, air circulation, and root space. Overcrowded plants compete for resources, develop weaker stems, are more susceptible to disease and pests, and produce less. Even indoor container plants need enough space between pots for air to circulate and light to reach lower leaves.
How close together can I put houseplants?
Allow enough space that leaves from adjacent plants don't overlap significantly and air can circulate between them. As a guideline, leave at least a few inches between small pots and 6-12 inches between larger plants. Some grouping is fine (and beneficial for humidity), but avoid dense packed arrangements that block airflow.