When it’s time to transplant into larger containers, your choice of container size, container setup, and your transplant method are all important factors. Each can impact the success of your transplant. Since I have have quite a bit of experience with this, I thought I’d share a few tips to help you successfully transplant your young marijuana plants. Some of these tips are common sense while others may be new even for experienced growers.
1. Pot size selectionA great rule of thumb is to choose a new pot that is at least double the size of the old one. Avoid potting up into a huge pot, If you place a 6-pack sized root ball into a 5 gallon pot you’ll have to keep 5 gallons of soil moist which at first the roots won’t reach. This is a waste of water and plant food. Larger pots will also require greater spacing which for indoor growing means more lights and wasted electricity.
2. Assess root ball conditionIf your plant has become overly root bound in its old pot, consider breaking up the root ball a little. Gently pull it apart just enough to break the shape of the old pot. Some roots will be damaged but in the long run it will help the roots break out of the old pot shape and aid in root expansion.
3. Avoid StressBe sure not to transplant in direct sunlight. Roots don’t like direct light or exposure to dry conditions. Transplant in the early morning or better yet the evening. If possible, allow freshly transplanted plants to remain in their old environment for a day or two before moving them into new conditions.
4. Stake plants
If the plants are tall and delicate, or have a hard time standing on their own, stake them with bamboo and secure with at least 2 plant ties. This helps prevent them from being overturned if jostled. As the plant develops, be sure to remove these ties or they will become tight and even girdle the plant.