Jiffy Seed Starting Mix For Weed

The difinitive guide to germinating cannabis marijuana seeds from AmsterdamSeedSupply. Much controversy surrounds the raising of cannabis seed. Many first time growers are bombarded with advice, often conflicting, on how exactly this should be done. Right now it's in miracle gro seed starting soil. And so far its doing great. I was thinking I should just keep it in this soil. Good idea or no? If your initial germination process was successful, it’s time to move your cannabis seedlings into jiffy pellets. The goal of this process is to provide new

Germinating Cannabis Marijuana Seeds

Much controversy surrounds the raising of cannabis seed. Many first time growers are bombarded with advice, often conflicting, on how exactly this should be done; however, it need not be such a complicated task. Cannabis seed is simple to grow, and if fresh, 90-100% germination rates are not unusual.

The ‘Kiwiland Method’ for raising seed, has been developed from professional horticultural practices used the world over. We use it because it works, and it’s simple.

Table of contents

Needed equipment

The list below is standard equipment recommended by Kiwiseeds and assumes you already have the necessary grow space and lighting set up. If you haven’t already got your equipment you can buy that online at https://www.kiwiland.com/

1. Propagator with bottom heat or
2. Heat pad + seed-tray
3. Thermostat controller
4. Soil thermometer
5. Perlite

6. Large jiffy pots + seed-raising mix or
7. Rockwool starter blocks
8. Fine sprayer
9. Identification labels

Perlite preparation

Wet thoroughly enough perlite to cover the bottom
of the propagator approximately 2cm deep. Plug the propagator, or heat pad, into the thermostat controller, plug the controller into the power and set for 23 C. Place the heat-sensing probe into the wet perlite just beneath where the seedlings roots will be. If using a heating pad lay it out beneath the propagator tray.

Jiffy pots preparation

Pre-soak the jiffy pots in warm water then fill them to the top with seed-raising mix making sure to take out any bigger pieces that may obstruct the young shoot as it emerges.

(This can also be done with the help of a coarse sieve if you like.)

Completely saturate the jiffy-pots and their contents, but allow them to drain well. Do this carefully so as not to wash the fine soil away. Top them up and repeat if the mix has sunken too much. It’s important to have them as full as possible to give the young roots plenty of room to grow for the week or two until they are potted on, and, because having a greater volume of the mix in the pots means they take longer to dry out under the warm lamp.

With a thin pointed object such as a pencil, make a small hole in the center of each jiffy-pot about twice the depth that the seed is long (This varies with strain, but 5-8mm deep should be sufficient. Often the mistake is made of planting seeds too deeply, and they rot before they see the light of day. To ensure this doesn’t happen, never sow seeds deeper than 1cm). If sowing more than one variety remember to prepare identification labels in advance and label them as you go to prevent mix-ups.

Put the cannabis seeds in Jiffy pots

Sow seeds directly into the holes, and cover with a little of the moist seed-raising mix from around it with the help of the pencil. Use a little more fine mix if needed. Some growers have the patience to sow seeds a certain way up, and this can be beneficial, especially with big seeds. If this is done place the seed, point up, ensuring the root can travel downwards with ease.

Watering the seeds

Using the mister bottle, spray the freshly covered seeds until the mix is damp. Don’t pour water onto the pots as this can wash away the mix and expose seeds.

Transfer jiffy-pots into pre-warmed propagator tray, and settle them in making sure the wet perlite surrounds the pots, getting right up between them. This ensures the pots stay moist until well after the seeds germinate, protecting the young roots from drying out.

Lighting, temperature & humidity

Set the tray under either fluorescent lighting or a low-wattage H.P.S. to keep the newly planted seeds warm. At this stage no light is necessary but warmth is important, and low light provides this without drying the pots out. An air temp of 20-22C is ideal, a degree or two lower than the soil temp (around 23C). Humidity if regulated can be set for around 60%.

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Growing the cannabis seedlings

As soon as the seedlings have germinated they need light. The food store supplied by the seed itself has all but been used up, and the plant needs light to photosynthesize and grow.

When growing marijuana in the vegetative stage you may choose how long you wish to keep the lights on, as long as it’s 18 hours or more. The advantages are that plants will grow faster with 24 hours light, and a constant temperature is easier to maintain this way, something hugely beneficial to young seedlings. Disadvantages are that you’ll need to water more, of course, your lamps and ballasts don’t get a break, and the electricity bill increases.

Some people advise keeping young seedlings under fluorescent lighting for a while but this doesn’t provide them with the correct spectrum for photosynthesis. It is best in our opinion to place seedlings directly under low wattage H.P.S lamps, 150/250/ or 400 watts, at a good distance away.
Once the plants are a few days growing they need to be moved closer to the lamps in order to prevent stretching. Move them as close to the lamp as the tops of many plants would be comfortable. (30-60cm depending on the lamp size.)

Make sure a breeze (oscillating fan) is blowing over the young plants, primarily so they don’t overheat, but furthermore to help strengthen delicate stems by stimulating cellulose production. Spindly stems cannot support heavy flowering growth. The importance of your internal air circulation cannot be stressed enough. It will exercise your plants and make them grow stronger while reducing many hazards that could ruin your crop.

Now that the plants have strong light they require more water and nutrients as well. A light organic feed or nutrient solution starting with an E.C of no more than .8 (with the water already at .5) can be sprayed directly on the plant and watered into the soil. The seed-raising mix contains no nutrients so within a few days the plants will be hungry.

Young seedlings love humidity, and a constant 60-70% is ideal at this stage. Use a cheap mister bottle, and spray regularly freshwater (ph- 6.5-7.5) over the leaves. This increases humidity, and washes dirt and dust off the leaf surface, unclogging stomata and enabling the plant to breathe properly. In natural conditions, the rain would do this for us.

Problems raising seedlings

Problems can occur during germination. Here is a list of some of the more common reasons why your seeds may not be doing so well.

Too wet
Seeds need to be damp, not wet for germination. Excess water prevents oxygen from getting to the seed. Poorly drained soils may also cause soil fungus diseases. The condition of wet soils may be improved by adding perlite, which will aerate your soil. Make sure any trays or pots you use have holes in the bottom to let the excess water drain.

Too dry
A certain amount of water is essential for germination, so maintaining constant soil moisture during the germination period is vital. Spray the soil surface with a fine mist, or cover containers with glass or a damp cloth to prevent your soil drying out. Make sure you remove the cloth once the shoot emerges.

Too hot
High temperatures result in excessive soil desiccation and injury to seeds and seedlings. We recommend a constant temp of 20-25 degrees.

Too cold
Cold temperatures can kill seedlings and prevent germination. Cool temperatures can result in slow, uneven germination, and attack by soil diseases. If growing outside, you may want to start your seeds indoors, before outdoor planting. Make sure planting is not done too early when there is still a chance of frost.

Too shallow
If you sow your seeds too shallowly the seeds can dry out. A depth of between .5 to 1cm is about right.

Soil too firm
Making your soil mix too firm can prevent oxygen from getting to your seeds and drainage can be affected. Pat freshly covered seeds lightly with your fingers.

Soil too loose
Soil that’s too loose results in too much air surrounding the seed. Seeds planted in this manner will not absorb moisture properly, and it’s likely they’ll dry out. Cover freshly sown seeds with fine mix and pat down lightly with your fingers.

Soil fungus
Seeds may rot, or the young seedlings may fall over. Overwatering, poor drainage and lack of aeration will increase the likelihood of this occurring. Plant seeds in sterilized potting mix, and make sure your containers are clean.

Non-viable seed
If your seeds have not been stored correctly they can deteriorate. Look for darker seeds that are a little bigger, without cracks or chips. Any seeds that look shriveled or wrinkled should be discarded, as this means the seed has dehydrated and is dead.

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Can you grow a marijuana plant in seed starting soil?

Right now it’s in miracle gro seed starting soil. And so far its doing great. I was thinking I should just keep it in this soil. Good idea or no?

halfaweek
Active Member

I find that it does not hold water very well and drys out to fast end up watering all the time instead of once a week

GodofArmageddon
Member

That’s true, but i don’t really mind watering it a lot. But besides that do you think it’s a good soil?

dank smoker420
Well-Known Member

ive used that before if i did again i would mix in some jiffy seed starter mix or some verm. i like to use the jiffy seed starter mix and perlite as my soil. i hear people talk bad about the jiffy mix saying that it isnt good but ive had great success with it.

halfaweek
Active Member

I really dont find a problem with it other than watering its just that the water does not stay then the nute i added dont stay big waste i use a grow mix from my hydro store its really close to a seedling mix just holds water better

Wetdog
Well-Known Member

Right now it’s in miracle gro seed starting soil. And so far its doing great. I was thinking I should just keep it in this soil. Good idea or no?

I know a grower that uses nothing but MG seed starting mix start to finish and has done so for years.

Hilltop112
Well-Known Member

seed mix doesn’t have alot of nutrients in it and as pointed out above dried out alot quicker than normal soil, You could grow in Seed mix but why not spend the little extra for some real soil and get better yields?

beecee
Active Member

i used the seed mix just to start and i thought it worked great. when it was time to transplant most of the seed mix just fell of the roots and the transplant was very easy. they took to the new soil very quickly. no signs of stress. not sure i would want to do the whole process in it though.

bird mcbride
Well-Known Member
Izoc666
Well-Known Member

Yes GOD, it will be fine just use this seed starter soil ! thats way you can control the nutrients for this plant. and hand watering daily, it will make your plant grow real faster. Since im soilless guy, gotta love this method

Happy growing and peace

Johndoe77
Member

Jiffy is great for starting seeds but YES it does dry out really fast if you remove your dome. I found good results by mixing a 60 percent jiffy and 40 percent coco. My seeds were up in 48 hours and I plant straight in seed starting trays. I don’t do the paper towel as I find it wastes a few days.

Hollatchaboy
Well-Known Member

Jiffy is great for starting seeds but YES it does dry out really fast if you remove your dome. I found good results by mixing a 60 percent jiffy and 40 percent coco. My seeds were up in 48 hours and I plant straight in seed starting trays. I don’t do the paper towel as I find it wastes a few days.

You prolly won’t get any response from the OP, or anybody else in this thread, seeins how they haven’t posted in the thread since 2012.

Transplanting Cannabis Seedlings Into Jiffy Pellets

If your initial germination process was successful, it’s time to move your cannabis seedlings into jiffy pellets. The goal of this process is to provide new sprouts with a medium in which they can establish a small, but strong root zone.

New growers often skip the first stage of germination and sow cannabis seeds directly into moist soil, only later to be disappointed when seeds cease to sprout. This fruitless process can be caused by two reasons. First, if the soil is too wet, seeds can become waterlogged and turn to rot; second, cannabis seeds germinating in soil often have an unpredictable trajectory. If sown too deep, for example, the taproot may search for oxygen above ground and send the rest of the plant deeper into the soil. With the paper towel method, however, cannabis seedlings have the best chance of successful germination. Once the taproot is exposed, growers can avoid root rot, successfully predict the trajectory of the plant and safely transfer seedlings into their next home.

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Ready to get growing? Watch our YouTube Series or read the following article to learn more about transplanting cannabis seedlings into jiffy pellets.

Step #1: Soak Jiffy Pellets

Jiffy’s are small, cost-effective, compressed peat pellets. Because of their size and highly porous nature, Jiffy pellets are ideal for germination. Begin the process by preparing a nutrient solution of B vitamins and water. B vitamins reduce plant stress during transition phases of growth, promote root development and usually contain absorbable elements like potassium. About 2 litres or half a gallon of water will be sufficient for hydrating four Jiffy Pellets.

After the nutrient solution is prepared, toss your Jiffy pellets in to soak. Wait 5-10 minutes for the Jiffy’s to adequately absorb the nutrient solution. You can check if your Jiffy’s are prepared by gently squeezing the outside of the pellet. If any pieces of peat haven’t been loosened, place them back into the nutrient solution for another 5 minutes. Once the Jiffy pellets are thoroughly soaked, gently wring them out and place them to the side. Like the paper towel method, the goal of this process is not to bog down your seedlings with a soaking wet environment, but rather provide them with a moist, dark area, with high levels of humidity.

Step #2: Transplanting Seedlings Into Jiffy Pellets

Examine each sprout: if the taproot is at least ¼” long, they are ready to be transplanted into jiffy pellets. Carefully take each seedling and place them in their respective pellet with the taproot facing down. Tweezers may be useful in this task, as long as they have been sanitized beforehand with boiling water, alcohol or hydrogen peroxide. Finally, gently cover the seed shell in a small amount of soil. Do not compress any of the topsoil covering the seed. The point of layering the shell in soil is just to provide your germinating seeds with an adequate amount of darkness and humidity.

Step #3: Place Seedlings in a Germination Tray and Dome

Take your expanded jiffy pellets and place them in a standard 10” x 20” germination tray. Then, cover them with an appropriate 4” or 7” humidity dome. Since your seedlings will be living in this tray for the next 10-14 days, there are several tools available to help manage and control the environment. A light source, heating mat and digital thermometer/hygrometers are just a few examples of tools needed to stabilize the environment within this tray. Here are some of the features of each piece of equipment:

Lighting:

Choose a low wattage, low-intensity light source. T5 fluorescents or LED lighting is a great option to consider. At this stage, the light source is only there to encourage upward movement, not vigorous growth.

Heat Mat:

A heating mat’s purpose is to raise the temperature of a small space to an adequate level. Especially during the colder seasons, a heating mat may be essential for providing your seedlings with a constant temperature of at least 70 degrees Fahrenheit (21C). Also, consider purchasing a heat mat temperature control gauge to maximize the efficiency of your tools.

Digital Monitors:

The purpose of a digital thermometer/hygrometer is to measure the constant temperature and humidity of a given space. Some monitors even come with extended probes, allowing you to measure the temperature/humidity of specific sections of the humidity dome. For the best outcome, attempt to keep your seedlings in an environmental range of 70-75 degrees Fahrenheit (21-24C) and a minimum 70-80% relative humidity

Step #4: Set It, But Don’t Forget It

Over the next few weeks, your seedlings will begin to develop a root zone that will spread through the jiffy pellet. Also, the “true leaves” of your seedlings will begin to appear. Unlike the “sucker leaves” which first emerge from the seed shell, true leaves will be much larger, resemble typical cannabis leaves, and indicate future growth, progression and plant establishment.

This period of growth will be slow: in some cases, the transition period can take up to 14 days. So, don’t worry if you can’t see measurable growth overnight. Set your plants up for success, leave them be, but don’t forget them. Monitor your tools, control levels of temperature and humidity, and if necessary, spray your plants with a light solution of B vitamins or liquid seaweed solution. Be patient and soon enough, your seedlings will be ready to continue growing as established plants during the vegetative stage.

Join us for more information about growing cannabis at home! For more information on transplanting your cannabis seedlings into jiffy pellets, contact our team at Grow Your Four.