Have you ever looked at your cannabis plants and wondered if they are getting exactly what they need to thrive? It feels like a guessing game, right? Choosing the perfect food, or “feed,” for your weed plants is one of the biggest challenges for growers, whether you are just starting out or have been growing for years. Getting the nutrients wrong can lead to sad, small yields, or worse—sickly plants that just won’t flourish.
This confusion is real because there are so many different brands, formulas, and feeding schedules out there. Do you need more nitrogen now? Is phosphorus the key to big buds? Stop worrying about nutrient burn and deficiencies! In this guide, we will break down the science simply. We will show you exactly how to pick the best feed for every stage of your plant’s life, from tiny seedling to flowering powerhouse.
By the time you finish reading, you will have the confidence to mix the perfect nutrient solution every single time. Get ready to unlock your plants’ full potential and watch them grow bigger and healthier than ever before. Let’s dive into the essentials of feeding your cannabis!
Top Feed For Weed Plants Recommendations
- WEED KILLER PLUS LAWN FOOD: Scotts Turf Builder Weed & Feed3 weed killer plus fertilizer for grass kills existing listed weeds and feeds to thicken your lawn and crowd out future weeds
- WEED CONTROL FOR LAWNS: These weed killer plus lawn fertilizer granules control over 50 listed lawn weeds, including clover, dandelion, plantain, morningglory, chicory, eveningprimrose, and purslane
- WEED AND FEED FOR LAWNS: Apply this combination weed control and lawn food to your wet lawn when weeds are actively growing and daytime temperatures are consistently between 60°F and 90°F; don't apply more than 2X per year
- Scotts Liquid Turf Builder with Plus 2 Weed Control kills weeds and gives your lawn a quick boost of nitrogen to promote greening
- Liquid weed killer plus fertilizer controls dandelion, clover, ground ivy, henbit, chickweed, plantain, poison ivy, and other broadleaf weeds as listed
- Apply this ready-to-spray weed and feed when weeds are actively growing
- Care for your lawn with Scotts Liquid Turf Builder 2 Step Lawn Care
- Scotts Liquid Turf Builder with Plus 2 Weed Control kills, dandelions, clover, and other weeds as listed (see label for complete list)
- Scotts Liquid Turf Builder Lawn Food feeds grass while watering
- SOUTHERN LAWNS: Specially formulated for Southern lawns like Bermudagrass, St. Augustinegrass (including Floratam), and more, this grass fertilizer provides care and acts as a weed killer for lawns
- 6-MONTH PROTECTION: Delivers up to 6 months of weed prevention, stopping listed broadleaf and grassy weeds, including crabgrass
- WEED KILLER: Kills listed weeds like dandelion, dollarweed, and clover, serving as a reliable weed and feed for lawns to keep your lawn healthy and maintain its beauty
- Kills over 250 common lawn weeds - including dandelions, clover and plantain
- Ideal for smaller lawns providing continuous feeding for up to 8 weeks
- Restores nutrients to the soil and helps lawn retain water to protect against heat and drought
- Scotts Turf Builder Weed & Feed5 weed killer plus fertilizer kills existing listed weeds and feeds to thicken grass and crowd out future weeds
- Weed Control and Lawn Fertilizer: controls over 50 listed lawn weeds, including clover, dandelion, plantain, morningglory, chicory, eveningprimrose, and purslane
- Weed and Feed for Lawns: Apply this combination weed control and lawn food to a wet lawn when weeds are actively growing and daytime temperatures are consistently between 60°F and 90°F; do not apply more than 2X per year
The Essential Buying Guide for Weed Plant Feed
Growing healthy, vibrant cannabis (weed) plants requires the right nutrition. Choosing the best feed can make a huge difference in your final yield and quality. This guide helps you select the perfect food for your plants.
Key Features to Look For
When shopping for weed plant feed, look for these important features:
- **NPK Ratio:** This stands for Nitrogen (N), Phosphorus (P), and Potassium (K). These are the three main nutrients plants need. Young (vegetative) plants need more Nitrogen. Flowering plants need more Phosphorus and Potassium. Check the label for the right balance for your plant’s stage.
- **Micronutrients:** Good feeds include smaller amounts of other necessary elements like Calcium, Magnesium, Iron, and Zinc. These keep your plants strong and prevent problems.
- **Formulation Type:** Feeds come in liquid or dry (powder/granule) forms. Liquid feeds work fast but you must mix them often. Dry feeds release nutrients slowly over time, which is easier for beginners.
Important Materials in Weed Plant Feed
The materials inside the feed determine how well your plants grow.
Organic vs. Synthetic Nutrients
You have two main choices here. Organic nutrients come from natural sources like fish emulsion, bone meal, or seaweed. Many growers prefer organic because it often improves the final taste of the buds. Synthetic (or mineral) nutrients are made in a lab. They deliver precise amounts of nutrients quickly, which gives you tight control over feeding.
pH Compatibility
The feed itself must work well with the pH level of your water or soil. If the pH is wrong, your plants cannot properly “eat” the nutrients, even if they are present. Many high-quality feeds are buffered to help keep the water pH stable.
Factors That Improve or Reduce Quality
What makes one brand better than another?
Improving Quality
High-quality feeds often include beneficial microbes or enzymes. These help break down the nutrients into forms your plants can easily absorb. Using high-quality, balanced feed tailored to your specific growing medium (soil, coco coir, or hydroponics) significantly improves plant health and final product quality.
Reducing Quality
Using the wrong feed ratio is a common mistake. Too much Nitrogen during flowering can hurt bud development. Conversely, not enough food causes yellowing leaves and stunted growth. Always follow the feeding schedule provided by the manufacturer. Overfeeding is easy to do and often burns the roots, which reduces quality.
User Experience and Use Cases
How you use the feed matters for your experience.
Beginner Growers
Beginners should choose simple, all-in-one “grow” and “bloom” liquid kits. These usually require mixing just two or three bottles. They are straightforward and reduce the chance of mixing errors. Hydroponic growers need specialized, water-soluble feeds designed not to clog pumps.
Experienced Growers
Experienced growers often use multi-part feeding systems or build their own nutrient schedules using base nutrients plus specialized additives (like bloom boosters). This allows for fine-tuning the plant’s diet day by day.
10 Frequently Asked Questions (FAQ) About Weed Plant Feed
Q: When should I start feeding my weed plants?
A: You usually start feeding when the plant develops its second set of true leaves, after the initial seedling stage. Seedlings get enough food from the seed itself for the first week or two.
Q: Should I feed my plants every single time I water?
A: No. Most soil growers feed every second or third watering. Always check the manufacturer’s instructions. Watering with plain water between feedings helps flush out any built-up salts.
Q: What does “flushing” mean?
A: Flushing means watering your plants with plain, pH-balanced water for the last one to two weeks before harvest. This forces the plant to use up stored nutrients, resulting in a cleaner, smoother final product.
Q: Can I use general vegetable fertilizer instead of specialized weed feed?
A: You can, but it is not recommended. Weed plants have very specific nutrient needs during the flowering stage that general fertilizers usually do not meet correctly.
Q: What is the ideal pH level for feeding?
A: For soil grows, aim for a pH between 6.0 and 7.0. For soilless or hydroponic grows, aim for 5.5 to 6.5. Measuring pH is crucial for nutrient uptake.
Q: Why are the leaves on my plant turning yellow?
A: Yellowing leaves are a sign of a nutrient deficiency or, more commonly, overfeeding (nutrient burn). Check your feeding schedule first.
Q: How do I store leftover liquid feed?
A: Keep liquid concentrates tightly sealed in a cool, dark place. Never mix more liquid feed than you plan to use in one session, as unused, mixed solutions degrade quickly.
Q: Do I need different feed for autoflowering strains?
A: Yes. Autoflowers grow and flower much faster than photoperiod strains. They benefit from specialized “auto” feeds that often have a slightly different ratio to support their quick life cycle.
Q: How do I know if I am using the right amount of dry feed?
A: Dry feed is usually mixed into the soil or top-dressed onto the surface. If you use a slow-release dry feed, you typically only need to add more every 4–6 weeks, depending on the product.
Q: Is organic feed always better than synthetic feed?
A: No. “Better” depends on your goals. Organic feeds often create better flavor, but synthetic feeds offer faster, more predictable growth control.
Hi, I’m Tom Scalisi, and welcome to The Saw Blog! I started this blog to share my hands-on experience and insights about woodworking tools—especially saws and saw blades. Over the years, I’ve had the chance to work with a wide range of tools, and I’m here to help both professionals and hobbyists make informed decisions when it comes to selecting and using their equipment. Whether you’re looking for in-depth reviews, tips, or just advice on how to get the best performance out of your tools, you’ll find it here. I’m excited to be part of your woodworking journey!