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2 week old marijuana plant

100 Watt CFL Grow / Update#2: What Should A Marijuana Plant Look Like At 2 Weeks Old?

One of the most common questions asked by novice growers is “What should my plants look like at x days/weeks old?”

Naturally, anyone putting their time and effort into a project wants to have a point of reference against which to judge their own progress (or that of their pants, in this case). The answer is:

Plants will vary in size and appearance depending on a variety of factors: Genetics, soil, lighting, nutrients, temperature, handling, and the elusive “green thumb” factor. As you can imagine, a plant growing outdoors under full sun in June (northern hemisphere) will be a lot bigger at 2 weeks old than a plant growing in a converted computer case running 50 watts of lighting!

In any case, cannabis plants do tend to develop certain physical characteristics at certain times in their life span (first true leaves after 3 – 4 days, alternating nodes after 30+ days of vegetative growth, calyxes and pistils after a week of flowering light schedule, for example). Barring any problems, after two weeks of vegetative growth, you can expect to see a plant with several sets of leaves, and are likely to be able to smell that characteristic “mary jane” smell on your fingers after gently rubbing the leaves.

Don’t be surprised if your plants leaves alternate between “reaching up” towards the light and “sloping downwards” towards the ground – this is normal. Leaf color will range from an intense, deep green to a light yellow-green or “lime” color. What isn’t normal is yellow leaves with stunted-looking new growth, patches of brown or browned edges, dark spots or a mottled look to the leaves, or leaves curling up into a sort of “taco” shape.

Here are some shots from our current 100 Watt CFL grow. A two-week old Dinafem Critical + plant. She’s (yes, “she” – this is the only feminized seed in this grow) looking quite healthy and of good size for the humble 100Watt grow. She’s ready for transplantation into the larger final grow pot.

Next is a picture of a 10-day-old “Royal Queen Seeds Automatic x Double Gum” cross breed. Both of these plants are looking healthy, and have a particularly strong aroma so far:

For comparison, here is a plant that is not doing well. It is one of the three “Afghan Kush x Double Gum” cross plants in the grow. This plant has lagged behind from the start, although the others are exactly the size of the RQSxDG pictured above. Sometimes a “runt” does show up! This is one of the reasons I always recommend that first time growers grow two plants and then pick the strongest of the two to take into flowering.

This plant has the same soil, lighting, and music (yes, these plants seem to dig the new QOTSA album…) as the others, it’s just not doing well. The green thumb in me wants to try to save it, but I want to keep this little 100Watt grow under wraps so I can focus on our larger medical grow, so this plant will not make the transplant roster:

Notice the stunted look to the leaves – they don’t have the length and width of the previous pictured plants, and the color is a pale greenish yellow. In particular, the new growth leaves at the top look wrinkled and “mini”. Hey – this happens! In the wild, this plant would simply be overshadowed by taller neighbors and eventually just fade away. Why did this happen to this plant? My guess is simply that the genetic “roll of the dice” wasn’t particularly kind to this specimen. As this grow progresses, the different traits of each plant will become apparent – it will be very interesting to see how the “daddy” Double Gum plant’s offspring look with both the Afghan Kush mother and Royal Automatic mother plants. And all this under 100 watts – get yer popcorn ready!

[Author and Medical Marijuana Grower Glenn Panik’s “How To Grow Cannabis At Home: A Guide To Indoor Medical Marijuana Growing”, is available on iBooks here, for the Amazon Kindle or via Smashwords here. You can also order the ‘stealth title’ of our information-packed ebook for the Kindle here. Protect your privacy!]

One of the most common questions asked by novice growers is "What should my plants look like at x days/weeks old?" Naturally, anyone putting their time and effort into a project wants to have a point of reference against which to judge their own progress (or that of their pants, in this case). The answer…

Do these seedlings look ok for 2 weeks?

  • Dec 20, 2010
  • #1
  • Shootz
    New Member

    This is my first grow, they sprouted on 12/7. I am worried that I am under watering them I usually water every 2 days. Lately the soil is getting very crusty and dry should i water them more?

    Medium- FF light warrior 160z cups
    Strain- 5 nirvana WW, 2 freebie autos
    Humidity- 40-50%
    Temp- 75-80 light on 70-75 light off
    light-4 26w 5000k CFLs on 20/4 light cycle

    • Dec 20, 2010
  • #2
  • AK GreenLover
    New Member

    They don’t look to shabby for a few weeks of age. Mine are that size by the first week, but at least they look decently healthy.

    You do want a good wet dry cycle, but it’s really BAD if you let your soil dry out to much before watering. If your soil is to dry most of your water will run right through instantly. Your soil wont hold as much moisture as it should.

    I grow with CFl’s a lot and have never bothered with 5000k in veg. I can say I tried them once but didn’t get the growth I wanted and was used to. I would use 1 x 2700k and 4 x 6500k in my veg box. I did however find a use for my 5000k bulbs. I use them in the last few weeks of flowering, and it seems to help a little with size. Not anything to write home about but I did go hmm on my last grow. So I will be using them again late in flowering next time.

    The only other thing I would recommend you do is kill the 24 / 0 light schedule with a massive axe. 24 / 0 is excellent for clones or the first few days of veg but thats it. If you must pump them with so much light at least go with 20 / 4 instead. It will promote better root growth. Thats probably the biggest reason why your two week plants are the size of my less then 1 weekers on an average grow.

    Anyways over all good job! Keep up the good work.

    • Dec 21, 2010
    • Thread starter
    • #3
    Shootz
    New Member
    • Dec 21, 2010
  • #4
  • hc5guam
    New Member
    • Dec 21, 2010
  • #5
  • MrsLonely
    New Member
    • Dec 21, 2010
  • #6
  • Thew1sest
    New Member

    Yeah just make sure you’re not over watering/ feeding the little girls. In the beginning they’ll take to minor changes and show it quite well how they’re feeling. You seem to have the light spectrum and watering down, (Just make sure to not over/ under water). Letting them just grow, and they’ll do just fine. Marijuana is a resilient plant and can thrive in many conditions that most think it would not.

    • Dec 22, 2010
    • Thread starter
    • #7
    Shootz
    New Member
    • Dec 22, 2010
  • #8
  • Thew1sest
    New Member
    • Dec 22, 2010
  • #9
  • New Member

    if you going to put them under intense light. than is best to water them before doing so if is time for them to be water. than after that start put them under the intense light, after that.

    this way you’ll be safe and not get the top dry out. seedling won’t be growing to much untill they take root. so that’s not untill like atleast 3-5 day after they rooted well and than shoot to cum up. by than you is still not too late to start putting intense light on them.

    using a 400 hid light for right now. it won’t hurt. and the leave might grow alittle better. but the root hasn’t take place yet. so there no reason to be hurry. is not going to start growing fast untill there is enough root.
    so it won’t hurt but is not necesarry to to use that much light at this put because it just wont be growing all that much without now root. if your plant is dying without light that yes give light to them. otherwise i say save some money eletrictricity and wait untill they are ready. it won’t hurt by giving plant alot of light right now, but it wil only help a little more than with cfl bulb. is really up to you what you want to do. if you want the plant to grow fast right away than do it, if you can wait i say wait. wither way will work but if you want to save money and not have to wait too long. you don’t have to put to much light on it at this point, not untill i say a good 13 more days.

    so is really bad if you want to grow but not want to use to much electricity at this point. cause 13 more days is still alot of days of light if you talking hids. cfl now is only about a function of the price but is no wrong or right anwser here. if you can afford it that i say try it once and try cfl next tiem and see what’s work best and choice if you want to save money for the extra growth during this time. than go with that later on your growing years.

    This is my first grow, they sprouted on 12/7. I am worried that I am under watering them I usually water every 2 days. Lately the soil is getting very…