What is the Best Soil for Greenhouse Growing?

Quick Answer:

What is the best soil for greenhouse gardening? The ideal soil for greenhouse growing balances drainage, nutrient retention, and microbial activity—making custom blends like loam, triple mix, or super soil more effective than natural or bagged top soils. Should you use bagged soil or soil-less mixes in a greenhouse? While convenient, most bagged top soils and soil-less mixes lack essential nutrients and structure for long-term crops, so combining them with compost or organic amendments is key. How can you create high-performance soil for greenhouse plants? Blending your own triple mix (one-third soil, compost, and peat) or upgrading to a nutrient-rich super soil with worm castings, biochar, and trace minerals provides a strong foundation for healthier plants, richer flavors, and vibrant blooms.

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If you are new to gardening and think growing is just a matter of adding water, you're in for a surprise. With terms like super soil, triple mix, natural soil, and even soil with no soil—it's no wonder new gardeners feel overwhelemed. So how do you choose the right soil for strong, healthy growth? And how do you get the most flavorful food and the brightest blooms?

Quick Answer:

What are the 6 essential tips for cleaning a greenhouse before winter sets in? The best time to clean your greenhouse is in late fall when plant growth slows, focusing on removing dead plants, reducing watering, clearing cobwebs, washing overwintering plants, and cleaning row covers to prevent pests and diseases. A thorough fall cleaning deters common greenhouse problems like mold, fungus gnats, and spider mites, ensuring a healthier growing environment for the upcoming season. Starting early and cleaning on a sunny day optimizes results and prepares your greenhouse for a productive spring restart.

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Its never too early to get a head start

My husband and I planned a mid-week ski trip but on departure day I was still in my off finishing a time-sensitive project. We were staying overnight at the hill, it was still a workday, and the car was loaded up. There was no rush to get moving.

Quick Answer:

Preparing your greenhouse for fall involves maintaining appropriate night temperatures for different plants, thorough cleaning to prevent pests and diseases, and proactive pest management using safe insecticidal soaps, sterilized soils, and yellow sticky traps to ensure a healthy growing environment.

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There are many plant varieties and they all require different night temperatures to sustain their growth.

Greenhouse night temperatures

Quick Answer:

What are the tips for managing and double cropping in a greenhouse to prepare for winter? Effective greenhouse management in summer involves double cropping fast-growing plants like radishes between slower growers such as peppers, using trap crops like beans to monitor pests, and starting winter-hardy crops early to maximize space and season length. Planning ahead by maintaining seedlings in flats and supplementing nutrients ensures continuous, healthy growth, allowing gardeners to transition smoothly from summer to fall and winter crops. This strategic approach optimizes greenhouse productivity year-round and helps prevent common pest issues.

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Surprisingly, Summer is the perfect time to prep for winterization

Managing your winter greenhouse with crops coming and going is a bit of an art form, so please bear with me. It involves starting seeds directly in greenhouse soil and also starting seeds in flats on shelves or potting benches.

Quick Answer:

How Do I Grow Pesticide-Free Strawberries in My Greenhouse?
You can grow clean, delicious strawberries year-round in your greenhouse by planting day-neutral varieties in rain gutters filled with soilless mix, spaced for airflow and watered consistently. Start with bare-root plants, trim roots before planting, and fertilize with natural options like alfalfa pellets. Growing in a controlled greenhouse environment lets you avoid pesticides entirely, beat the commercial “Dirty Dozen,” and harvest berries earlier and longer than outdoor growers.

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I was just reading about how over-sprayed commercial strawberries area. I was reading this on the same day I was planting up my own greenhouse strawberries!

BC Greenhouse Builders is thrilled to announce...

Quick Answer:

Sterilizing your soil, pots, and trays is essential when starting seeds in a greenhouse to prevent disease, improve seedling survival, and create optimal growing conditions—use commercial seed starter mixes, sterilize reused containers with bleach, and consider homemade sterile blends or soil baking for best results. 

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Sterility in the greenhouse sounds somber but in a few instances, it truly matters and saves gardeners from hassle and disappointment. Here is where I heed caution.