I started to transplant seedlings from my seed tray into small pots yesterday. It was a very sunny warm day and a pleasant time to work on this, but it did take me half the day to complete, and I cut back on the amount of seeds I have sown as compared to last year.
Most instructions or reference books will indicate to transplant once the first true leaves have developed. Above is a photo of the stage at which I transplanted them yesterday. Usually, I wait a bit longer for those two top true leaves (above the cotyledons) to be a bit larger, but I had time to work on this and will be away from my greenhouse for the next few days. It will be sunny for a day or so and the temps will rise so putting them into bigger pots will help to reduce moisture loss or chances of soil dry out while I am not here to attend to moisture monitoring. (Tip: Water your seedling tray so the soil is moist before removing the seedling to transplant into a pot.)
I used 5-6″ round pots and added fresh slightly pre-moistened potting mix (not seedling mix) and I used a clean golden knife to make a hole to insert the seedling into. I’m probably over cautious and handle all with care as to not damage the small seedlings. The golden knife was from a utensils set I received as a gift over 30 years ago – yes, as a wedding gift. The funny thing is I never really liked the gold color so I stored the set – and now they are used as gardening tools for me in the greenhouse. I can’t remember who gave that set to me. They would be surprised to know I’m using them this way today.
I make a nice pocket to insert the seedling into the round pot. I do not fertilize at all at this point. The seedlings’ roots are still very fine and tender. I tend to not fertilize at all until a month later. Some recommendations will say to start fertilizing with half-strength with soluble plant food. I don’t do this at this stage. They will be able to stay in these pots for a 2-3 weeks, I think. I’ll keep you posted as I go along. It really depends on the amount of sunshine we get for growth results. (Tip: Remember, it still can snow in April – it did on 4/16/21).
I put some of them on a table set in the middle of my greenhouse and others on table racks. (Note: I do not recommend leaving on the glass like I did above, it is better to have air circulation below the pot as well as above, in my opinion. But sometimes I run out of space.) These are Cherokee Heirlooms above. Again, I usually wait till the seedlings are a bit larger but I had the time to do the work yesterday, so I got it started.
I also have quite a few Fox Cherry (yummy!!) tomatoes potted up (transplanted) as well. They are looking nice. I’m sure when we get more sunny weather, these will pop up rather quickly in growth. (Tip: If a seed shell is still stuck to the tip of a leaf, use a spray bottle to mist some water lightly on the seed, and it will remove easily.)
You can use seedling mix if you wanted to, but I tend to use potting mix at this stage. I handle them carefully, not pulling by the leaves but gently inserting the golden knife into the seedling tray cells and pushing up the root area as I remove them to put in the black pots. Sometimes I will bury the tomato plant just a little deeper. The stem has tiny hairs that turn into roots, but it is not necessary to do this (plant deeper) if you don’t want to. If your seedlings are leggy and stretchy however, this can be helpful.
I sowed these for the first time last year, the Goldies! See photo below. We had too much rain last year when they were outside, but I am hopeful this year will be better for these babies. I am careful to not over water them right now, because they are so tiny and tender right now, I don’t want any rot to set in at the base of the stem. Good air circulation on hot days in the greenhouse is helpful. If the sun is out and the temps rise quickly, vent the doors, and turn on a light fan. It is important to not make the soil soaking wet, and checking them often. At least I do.
Well, just a short post for today. We are getting rain all morning, up to 1 pm, then will be sun this afternoon, some of tomorrow will be sunny too. Bring on that sunshine. My new little tomato starts need them.
Remember, if you are local and interested in some of my tomato starter plants in mid-May, get on my list. I am not growing as many as last year, due to trying to conserve expenses (pots, soil, etc).
Zone 6b, CT
Broad Brook/East Windsor, CT
containercathy at gmail.com
www.ContainerGardensCT.com (container designer)