Can You Grow Bamboos Or Bouganvillea With Grow Light

Is it bad to put rocks in the bottom of a plant pot?

It is not helpful for plant growth. If the goal is to increase drainage so plant roots can get enough oxygen for respiration, this approach does not help.The common thinking was that water gets somehow stuck or pooled at the bottom of the pot, so coarse gravel would give an opportunity for water to move more freely to the holes of the pot.The problem with this is that water will find and exit the holes of the pot just fine, even without big spaces between gravel chunks at the bottom. The water that drains instead of staying in the pot is the water that cannot be held against the force of gravity within the medium itself. The nature of the medium and the force of gravity are not altered by adding a layer of rocks beneath it.The (usually) fine-textured medium in a pot will naturally hold on to water against the pull of gravity, because of the “stickiness” of water to itself and its surroundings. Because of a greater degree of contact with water molecules, a finer medium holds more water through cohesion, and results in a deeper saturated water column than a coarser medium.If you put stones in the bottom of the pot, you are just transferring the saturated zone upward by the depth of the stone layer. It is important to realize that the last few inches of media will be highly saturated compared to that in the rest of the pot, regardless of whether that last few inches is resting against the bottom of the pot or against a bed of gravel.If you want to increase drainage from a medium, make a coarser medium. Add bark or coarse perlite, or something else that creates larger air pockets uniformly throughout the volume of medium.

What happens when you water plants with coffee or tea?

I had an experience of adding the residue that remains after filtering tea decoction. Tea residue is actually a good manure for the plants as it gives them nutrients that they need to grow well. But that should be supplied in a limited quantity. I had added the residue repeatedly which even covered the soil. The plants were growing awesome for a few days after I had used the residue but as days passed, the concentration of the tea increased in the plants and the leaves started to dry and wither which gradually killed the plant.Something like this happened to my plants.I think the concentration of tea compounds increased in the plants so much and got accumulated in the leaves in an amount the plants could not handle or excrete.  So they just drop the leaves that are higher in concentration. Some big plants lost all their leaves and remained leafless for several days and then they started growing again after the concentration was reduced in the soil. Small plants that could not handle died off.The same thing happens with applying fertilizers such as urea in amounts more than the plant can handle. So just add how much fertilizers your plant needs. The amount varies with plant species and the age of the plants. As the plant grows, the amount of fertilizer it requires increase. So, I would advice you not to do that to your plants... Hope you won't do it.Thank you for the question by the way :)