This tutorial will teach you how to make rooted clones like this in a cup of water (it’s easy!) How to Clone Cannabis with the Cup Method. This section will take you through the process of cloning step by step. First, you will need a few supplies… Supplies list. A cannabis plant with at least 7″ long branches (these stems will become your clones) Sharp scissors Fresh clean water (spring water is great, but any human-drinkable water will work) A cup or container to put your clones in. Supplies needed for this cloning tutorial (cannabis plant, scissors, water, and a cup) Optional but not necessary.
General Purpose or Vegetative nutrients (FloraNova Grow is a great one-part nutrient for vegetative growth) – add to your water at seedling strength, or just give plain water Cloning powder and/or cloning gel. The little plants in this picture used to be branches on the plants behind them. As far as I can tell, it didn’t seem to make a difference in rooting rates. I would avoid letting direct light shine on the roots and make the water hot, but a little ambient light doesn’t seem to bother them. After trying it both ways, I personally use clear cups so I can easily see the roots as they form, but any cup or container will work. I’ve cloned in clear cups and opaque cups like this. You can clone cannabis in basically any cup or container. This clone made roots in a glass beaker after being left on the kitchen counter. If this is your first time taking cannabis clones, I recommend only taking cuttings from a vegetative plant that hasn’t started flowering yet. A vegetative plant is only growing stems and leaves, but no pistils or buds yet.
Plants in the vegetative phase tend to root more quickly and easily. On the other hand, clones taken during the flowering stage may take longer to make roots, and sometimes display odd growth patterns for the first few weeks after rooting. Some people take flowering clones on purpose to take advantage of those growth patterns. This is known as monstercropping but is considered an advanced growing technique. The goal is to have a rooted clone by the end of the tutorial. Then I’ll show you how to plant your clone in soil, coco, or hydro. Get all your supplies ready before you get started. Get your plant, your glass of water, your scissors, and put them all in the same place so you can smoothly cut clones and stick them immediately in water. Prepare your space with your plant, scissors, water, and cups. Don’t forget to label your cup with the strain name! You can dip the ends of stems into cloning gel and/or cloning powder, which may help them root more quickly. Many growers find they help plants root faster, but when it comes to this method, I’ve never really noticed much difference between clones that get dipped vs not dipped. However, it definitely can’t hurt and may help you in your individual environment. Spring water is my favorite water for cloning (or growing) weed. It doesn’t have all the minerals removed like filtered water or distilled water, and often has a lot less extra random “stuff” than tap water. That being said, I don’t have the option to use spring water all the time so I use regular filtered or tap water. Our local tap water is not great, with high PH and PPM. Yet it works great for growing and cloning weed as long as I correct the pH. Based on my experience talking to other growers, it seems like nearly all human-drinkable water sources work to grow weed as long as the pH is adjusted to be in the correct range. If your tap water is good enough to drink, it’s good enough for cup cloning (as long as you correct the pH!) Should I use nutrients? However, I personally like to give them a very small dose of nutrients in their water. If you already have nutrients you plan to use during your grow, I recommend using those at what’s listed on the bottle as “seedling strength”. If not, simply use half of what you would use in the vegetative stage. If you’re not planning on using nutrients during your grow (for example if growing in super soil), then it may be easier to stick with plain water for cloning so you don’t have to buy nutrients just for this part.
Step 1 – Identify which branches are at least 7″ (18cm) long on your vegetative plant. For first-time cloners, I recommend cutting clones that are around 7″ (18 cm) tall. That means you need to identify which branches on your plant are at least that long or longer. This size will fit in a typical drinking glass with the leaves able to reach over the top of the glass and “spread their wings” to the light. Your clones should be big enough to reach over the top of your cup. You can cut a clone that’s shorter than 7″ (I’ve successfully cloned a stem as little as 3″ tall). However, shorter clones typically take longer to root. I had one 4″ cutting that didn’t make roots after several weeks.
Out of curiosity, I just let it keep going and refilling the cup as the water level got low. I was amazed when it finally sprouted roots 2 months later. If your stems aren’t long enough yet, follow the tips below to get them to quickly grow longer. How do I make my plant produce longer stems for clones? If the stems on your plant are too short (or there aren’t many suitable clone sites or offshoots), you need to encourage the plant to branch out and give the stems time to lengthen If you haven’t yet topped the plant, do it now (cut off the top tip of the main stem).