Starting Cannabis Seeds In Solo Cups

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I have a couple of seeds that I have germinated already. I was wanting to know is it better to start them in a solo cup of soil to build up a root ball then… Transform Ordinary Solo Cups Into a Hybrid Hydroponic/Soil Plant Booster: If you have ever attempted to start plants indoors before your last frost, you probably know what it is to get a root bound plant. No matter the size of your growing container, it does not take the roots too long to find its outer boundaries. This m… Categories: Setup. Seedling. Grow Question by MagicPlants17. Best place to get answers to your grow questions. Worldwide community of enthusiast growers will share experience.

should I plant my seeds in a solo cup or final pot from the start?

I have a couple of seeds that I have germinated already. I was wanting to know is it better to start them in a solo cup of soil to build up a root ball then transplant into final pot or just plant them in the final pot from start to finish? I will be using fox farm soil. I will be using 2 gallon smart pots. I will be growing auto flowers.

grorite
Well-Known Member
grorite
Well-Known Member
WattSaver
Well-Known Member

The only reasons to use a small pot to start is to save on nutes or its the conditions you have to grow in, like a small veg box. But with an auto, I’d put it straight into your 2gal and go.

jcdws602
Well-Known Member

Start in the solo cups. I recommend using fox farms light warrior mix to start seedlings and new cuttings. after 2-3 weeks you can transplant into fox farm ocean forest or whatever soil you want.

edit. just realized they are autos. you can still start in solo cups
. you just don’t want them to stress during transplant. so be careful that’s all

texastiger707
Active Member

ok thank you. I was going to use fox farm ocean forest soil. My hydro shop was out of it. So I had to get fox farm happy frog. So is happy frog still good for autos?

grorite
Well-Known Member

i use happy frog had some pretty bad nute burn when i started seeds in it i suggest you get some cheap seed starting soil

Vindicated
Well-Known Member

You always want to have two inches of space between the root tips and the edge of your container. As long as you do that, you can pot up as often as you want. Larger containers means less watering and feedings, but it also means less room to grow plants. So you have to find a balance.

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The first time you grow a new strain, your not going to know how fast those roots are developing, so if you can, error on the safe side and go with a larger container. However, with autos the limit seems to be around 7 to 10 gallons. The plants only get 1-2 feet, so anything beyond 10 gallons is over kill IMO. In fact, many do fine in 3 to 5 gallons containers. A lot also has to do with your particular setup (timers, feeding frequency, planting medium, etc).

What has always worked for me is starting in 1 gallon smart pots using a good potting mix formulated for seed germination (I use Miracle Gro Seed Starting Mix), then I make sure to transplant before the end of the third week. Any longer and the roots will start poking out the bottom and sides of the smart pots. It also helps to let the plants get a little dry but not wilting just before transplanting and water immediately afterwords.

texastiger707
Active Member

You always want to have two inches of space between the root tips and the edge of your container. As long as you do that, you can pot up as often as you want. Larger containers means less watering and feedings, but it also means less room to grow plants. So you have to find a balance.

The first time you grow a new strain, your not going to know how fast those roots are developing, so if you can, error on the safe side and go with a larger container. However, with autos the limit seems to be around 7 to 10 gallons. The plants only get 1-2 feet, so anything beyond 10 gallons is over kill IMO. In fact, many do fine in 3 to 5 gallons containers. A lot also has to do with your particular setup (timers, feeding frequency, planting medium, etc).

What has always worked for me is starting in 1 gallon smart pots using a good potting mix formulated for seed germination (I use Miracle Gro Seed Starting Mix), then I make sure to transplant before the end of the third week. Any longer and the roots will start poking out the bottom and sides of the smart pots. It also helps to let the plants get a little dry but not wilting just before transplanting and water immediately afterwords.

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Transform Ordinary Solo Cups Into a Hybrid Hydroponic/Soil Plant Booster

Introduction: Transform Ordinary Solo Cups Into a Hybrid Hydroponic/Soil Plant Booster

If you have ever attempted to start plants indoors before your last frost, you probably know what it is to get a root bound plant. No matter the size of your growing container, it does not take the roots too long to find its outer boundaries. This method uses the benefits of hydroponic growing to keep those roots thriving, while preparing your plant to live in soil.

Step 1: Watch the Video

This Youtube video leads you through all of the steps of converting red solo cups into an outstanding hydroponic/soil planting solution.

Step 2: Keep a Couple of Your Old Solo Cups

You can use new ones of course, but why not get some use out of them first. We don’t judge you based on what was in the cup prior to starting the project.

Step 3: Let’s Put Some Holes in the Bottom of One Cup

Or I have found you can easily do up to five of these at a time, but you will want one hole-free cup for every cup into which you put holes. You can use a nail, scissors, box knife, any number of things to cut your cups; however I find that for the smoothest process and the least chance of unintentionally cracking out your cup, warming a screwdriver over an open flame for about a minute and then pushing down with some force and melting through works best.

Step 4: Put Potting Soil Into the Cup That Has the Holes

I have used straight compost for this before as well. Whatever growing medium you would normally use for a potted plant should be used here.

Step 5: Place Inside the Solo Cup Without Holes

Step 6: Plant Your Seedling Into the Cup

It is time to put your seedling into the new creation. Plant it like you normally would when transplanting a seedling into a larger pot. Then give it a good initial watering. There are drainage holes in the inner cups, so your plant should not get water logged, and the outer cup will prevent water from spilling out.

Step 7: After a Good Initial Watering, Water Sparingly

You want those roots to seek out the holes in the bottom. If the soil goes completely dry and there are not yet roots in the bottom, make sure to water to keep your plant alive, but as soon as you see a root peeking out the bottom of the inner cup, quit watering from the top.

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Step 8: Add Hydroponic Solution to the Outer Cup

Once you see that root peeking through, add hydroponic solution to the outer cup. The roots will thrive, and the plant will get tons of nutrients from the hydroponic solution. Your plant will grow as if it was in a much bigger pot, and be very health to transplant outside later.

Solo cups vs clear plastic cups for seedlings

I’m gonna plant sprouts in solo cups, but thought it might be cool to use clear plastic cups (to see when roots reach the edges). Would it be bad to use clear plastic cups? Maybe the roots/soil won’t like the light idk?

If you use see through just put a cooler cup on it if you got one that slides over it easily. Good luck and happy growing :evergreen_tree::evergreen_tree::evergreen_tree::facepunch:

Correct, plant roots do not like light and will die if exposed to it for a prolonged period. Roots grow under the ground – a dark environment, period.
Hope this helps. Organoman.

Debatable when soil vs. DWC lol I first started in water bottles with the tops cut and transplanted when the roots were spaghetti around the bottle :expressionless: lmao they love it, I love. debatable :the_horns::facepunch::ok_hand::+1:

Opaque cups. Roots hate Light. Trust me I am a dwc grower and well all know the troubles of root stress if the roots are exposed to light they can burn, which can in turn cause stress to your lady. It also attracts algae when watered which can in turn lead to much worse things in my opinion anyway. Though I will end with what I always say on this site. There is no “Correct way” to cultivate a cannabis plant. every grower has different methods that work for them. So dont take my advice as gospel use your common sense and I’m sure you will excel with the new seedlings 🙂 Best of luck for all your future harvests 🙂 Peace out

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