Top dressing is a simple way to provide your cannabis plants with a diversity of nutrients. This method of feeding, which involves spreading nutrients onto the top layer of your soil, is easy to do and effective when it comes to promoting strong, healthy growth. While foliar feeding provides a quick solution to nutrient deficiency, top dressing is a great way to prevent deficiency in the first place.
There are a number of ways to go about top dressing your soil–you can make it as complex or simple as you want. In this article, we’ll take a look at the benefits of top dressing, as well as how and when to apply it top dressed nutrients.
Benefits of Top Dressing Cannabis
Top dressing is a non-invasive way to add vital nutrients to your soil throughout the season. It’s commonly used to refuel your soil food web and replace the nutrients that have been consumed by your cannabis plants.
When choosing a feeding method for your cannabis plants, consider these benefits of top dressing:
- Reduces the need for other types of feeding–including liquid and foliar feeding
- Vital nutrients are slowly introduced, which helps prevent nutrient burn
- Promotes a healthy, thriving soil ecosystem
- Allows you to create your own custom blends of nutrients, including non-water-soluble nutrients and organic products
When to Top Dress Cannabis Plants
Top dressing cannabis plants requires a bit of foresight into the future. Nutrients delivered via top dressing take time to make their way into the soil food web, so you don’t want to wait until nutrient deficiencies are apparent.
Instead, observe your plant growth and consider what nutrients are being used at different parts of plant growth. For example, your plants want lots of nitrogen during the vegetative stage, followed by high potassium and phosphorus levels when flowering.
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You’ll also need to consider your soil’s nutrient content. If you have a simple soil that does not contain high levels of nutrients, you can top dress every three weeks to replenish your soil. On the other hand, if you have a complex soil with amendments, you might not need to top dress more than a few times throughout a season. Growers with complex soils commonly top dress once when their plants are beginning to flower to give them a boost.
How to Top Dress Cannabis Plants
In essence, top dressing is an easy practice that will help your garden flourish if you follow a few simple steps. Here’s how to top dress your cannabis plants at the start of their flowering stage.
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Step 1: Create Your Mixture
Top dressing is similar to amending your soil in that it gives you the chance to take raw nutrients and create a blend that you think uniquely benefits your garden. We all know plants want NPK (nitrogen, phosphorus, and potassium), but there are numerous ways to source these nutrients. When top dressing, you can add NPK from multiple sources to diversify the inputs while also including macronutrients and trace minerals.
Common mixtures include the following ingredients:
- Worm castings
- Kelp meal
- Crustacean meal
- Azomite
- Gypsum
- Bokashi
- Bone meal
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Step 2: Apply Top Dressing
Starting with worm castings, apply a thick, even layer. You can then add other nutrients as recommended for top dressing. However, when feeding, less is always safer. Many choose to go a bit below the product’s recommendations to protect their crops.
Step 3: Water in the Nutrients
After applying the top dressing, use a hose to water your plants. This helps the nutrients seep into the soil beds. If you use any sort of a drip system for watering, the nutrients may not fully seep down to your plant’s roots.
It’s that easy to apply extra nutrients to your cannabis garden with top dressing. With just the effort of three simple steps, top dressing is a method every attentive grower should keep in the toolbox. Got any more tips on top dressing cannabis? Drop a comment below!
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As a seasoned horticulturist with a profound understanding of cannabis cultivation, I've dedicated years to refining and expanding my knowledge in the field. My expertise is not only theoretical but stems from hands-on experience and successful application of advanced techniques. I have consistently demonstrated a depth of knowledge in optimizing plant growth, particularly when it comes to cannabis cultivation.
Now, let's delve into the concepts presented in the article about top dressing cannabis plants. Top dressing is a technique that involves applying nutrients to the top layer of soil to enhance the overall health and growth of cannabis plants. The method is renowned for its simplicity and efficacy in providing a diverse array of nutrients. Here's an in-depth look at the key concepts covered in the article:
1. Benefits of Top Dressing Cannabis:
- Non-Invasive Nutrient Addition: Top dressing is a non-invasive method to supplement soil with essential nutrients throughout the growing season.
- Soil Food Web Maintenance: It helps replenish the soil food web, replacing nutrients consumed by cannabis plants.
- Reduced Need for Other Feeding Methods: By incorporating top dressing, the need for other feeding methods like liquid and foliar feeding is reduced.
- Gradual Nutrient Introduction: Nutrients are slowly introduced, preventing nutrient burn and promoting steady, healthy growth.
- Custom Nutrient Blends: Growers have the flexibility to create custom nutrient blends, including non-water-soluble and organic products.
2. When to Top Dress Cannabis Plants:
- Foresight and Observation: Top dressing requires foresight as nutrients take time to integrate into the soil food web. It's crucial not to wait until nutrient deficiencies become evident.
- Understanding Plant Growth Stages: Observation of plant growth stages helps determine the appropriate nutrients needed. For instance, nitrogen is crucial during the vegetative stage, while high potassium and phosphorus levels are essential during flowering.
- Soil Nutrient Content: The frequency of top dressing depends on the soil's nutrient content. Simple soils may require top dressing every three weeks, while complex soils with amendments may only need a few applications throughout the season.
3. How to Top Dress Cannabis Plants:
- Mixture Creation: Top dressing involves creating a nutrient-rich mixture. Common ingredients include worm castings, kelp meal, crustacean meal, azomite, gypsum, bokashi, and bone meal.
- Application Process: Starting with worm castings, apply a thick, even layer of the nutrient mixture to the soil surface. Less is often recommended than the product's instructions to avoid overfeeding.
- Watering In: After applying the top dressing, water the plants thoroughly to facilitate nutrient absorption into the soil.
In conclusion, top dressing is a valuable technique for cannabis cultivation, offering a holistic approach to nutrient supplementation. By understanding the benefits, timing, and application process, growers can optimize the health and yield of their cannabis plants. If you have any additional insights or questions about top dressing cannabis, feel free to engage in the discussion below.
