True Leaves: As the seedling grows, the cotyledons will wither and what are called the first "true" leaves will form. This is when your seedling begins actively photosynthesizing.
true leaves
The real leaves that develop on the plant as it is growing. The first true leaves are typically the second pair of leaves that develop on a seedling.
tuber ...
True Leaves The first hardy leaves, usually the second pair, on a new plant.
Truncate With a leaf or part abruptly cut.
Truss A non-technical term for a domed flower mass.
True Leaves
When the seedlings first emerge, they have a set of small leaves. The next set of leaves that grow are usually considered the 'true leaves.'
Tuber
A thickened underground stem or root (ie. A potato is a tuber) ...
When true leaves have appeared, transplant the seedlings into 2-1/4inch pots and place them in your sunniest window or under a grow light. The plants will do best if you keep your home temperature at 60 degrees at night.
Once several true leaves appeared, it was time to pot Natalie's two little plants into individual quart containers, in a mix of potting soil, a little peat moss and about 50 percent coarse sand.
The first two true leaves that appear are opposite and ovate with smooth edges. Later leaves are alternate, arrowhead-shaped and with unevenly-toothed edges. At the top of the plant, the leaves become long and narrow.
Cultivation: Start seeds in pots or flats and transplant to garden when several true leaves are showing.
Once the first true leaves (the second set to emerge) develop, you can begin to feed your plants. Up until this time the seedlings have been being nourished from the seed itself.
Named in honor of the French scholar Nicolas-Claude Fabri de Peiresc, the genus Pereskia boasts the unique characteristic of being one of the few cactaceous genera to bear true leaves.
As soon as seedlings produce their first true leaves (these tend to look quite different from the seed leaves), they can be pricked out into trays of compost. Handle each seedling very gently by one of the seed leaves, not by the stem.
Fertilizing: Once your seedlings develop their second set of true leaves, it is time to start feeding them. Young seedlings are very tender and can't tolerate a full dose of fertilizer.
When the plant bears a few true leaves, they need to be thinned out and transferred to bigger pots.
Transplant the seedlings into 4-packs after 7 to 8 weeks, when the seedlings have developed 2 or 3 sets of true leaves. At this stage, the seedlings are not as prone to rosetting, so it's not as critical to keep temperatures below 75 degrees.
When the seedlings get their first set of true leaves, carefully transplant into individual containers. Dig under plants, and lift and separate them carefully to avoid breaking fragile stems or damaging tender roots.
Transplant the seedlings when they have four to six true leaves. Be sure to harden off both purchased and homegrown seedlings before transplanting by gradually exposing them to outdoor conditions over a period of five to seven days.
Once the seeds have sprouted and the first true leaves appear, it's time to transplant the seedlings outside. The pumpkin plants are extremely delicate, and care must be taken when transitioning them outdoors.
is the only species of cactus with true leaves. The Melocactus sp. is the only genus with a cephalium, or colourful crown formed of elongated bristles. Notocactus scopa var. alba is Paul's favourite because of its geometrically repetitive formation.
It's important to prick out as soon as the plant is ready which is usually when the first true leaves emerge (ie the second set of leaves that emerge after the seed or cotyledon leaves).
Once the seedlings have developed at least one set of true leaves, pot them up into their own individual containers. Each time you do this, add some fertilizer to the soil mix.
Lift the plants from the seed flat when they have developed their first true leaves. Gently pry the plant up as it is being pulled to help prevent breaking the roots. Handle the plant by the leaves, not the stem.
When the first true leaves appear, use sharp scissors to snip some weaker seedlings right at soil level.
When zinnia seedlings have two pairs of true leaves, they need to be thinned by pinching off all but the most vigorous seedling at ground level.
Bury them down to the first set of true leaves for stockier plants. Water in well and provide even moisture; do not overwater or keep the soil soggy or you will have fungal problems (Botrytis). If you let the seedlings dry, they will die.
Most micro greens are harvested as soon as you see the first true leaves. Because of their size, they're best used as a special touch to a dish.
Transplant seedlings after they develop at least one set of true leaves. Transplant into individual pots or thin within the flat. Remove seedlings carefully to preserve as many roots as possible.
6. When seedlings have two sets of true leaves, thin those that are too closely spaced. Transplant the thinned seedlings to fill empty spaces in the bed.
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When seedlings develop two true leaves, thin to one per pot or cell. In flats, thin to about one plant every 1.5 inches, or transplant to individual pots or cells.
Once the seedlings have developed true leaves, cut all but the healthiest one off at ground level with scissors.
- When seedlings are about 2 inches tall and have at least one pair of true leaves, snip off all but the strongest plant in each pot at soil level.
cataphyll -- In cycads, a scale-like modified leaf which protects the developing true leaves.
columella -- A small column of tissue which runs up through the center of a spore capsule. It is present in hornworts, mosses, and some rhyniophytes.
As a general rule of thumb, transplant when the young plant develops its "true leaves"... the first or second set to appear after the initial "germination leaves.
I started some black-eyed susan vines indoors in early April. They have the true leaves on them now but they aren't very big...seems like they are growing slow!! I recently put them outside in the jiffy pots and I want to plant. More ...
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Definition as written by Windy:
The cotyledon are the embryonic leaves and wither when the first true leaves develop. This is very noticable on a bean seed where sometimes you can see the whole bean split and the cotyledon appear.
The first two leaves that sprout from a seed are called the seed leaves, or cotyledons. These are not the true leaves of a plant. The seed develops these first leaves to serve as a starting food source for the young, developing plant.
To keep the roots from becoming crowded, transplant seedlings into 2 in (5.1 cm) pots as soon as the first true leaves develop, and grow on in a sunny place at 60°F (16°C).
And above those will be the first two true leaves. Sprouting beans can sometimes be purchased as six packs at garden centers, but the beans develop so quickly that planting the seeds is usually the best choice.
Space small seeds 1/8, medium seeds 1/2 and large seeds an inch apart. Space rows 1-1/2 to 2 inches apart to allow seedlings room to grow their first true leaves before transplanting.
Hitchcock says, "A leaf of the embryo of a seed". More simply the first leave(s) to appear after the seed germinates and before the true leaves appear.
cuticle
The protective layer of cutin covering the epidermis of plants.
Cotyledon(s)
The seed leaves, which are present before germination, as distinct from true leaves, which develop after germination.
Cotyledon-The leaf or leaves of the embryo, also called seed leaf or first leaf. The "true leaves" are the larger leaves that emerge next.
After the seedlings have formed their first true leaves, it's time to thin them out. Remove all but the healthiest starts, leaving appropriate spaces between. Follow the recommendations for spacing on the packet of seeds you are using.
The largest of the seedlings in this image is a tomato (volunteer, it's a lettuce bed, as you can see by the other seedlings). Note how different the first leaves out and the first True leaves are.
Keep the soil at room temperature. Once sprouts have grown two true leaves in addition to their cotyledons (sprouting leaves), transfer them into larger, biodegradable containers and space them two to three inches apart.
a very small amount of fertilizer, often referred to as a nutrient charge, as well. Most of this will leach out within two weeks after irrigation starts. In fact, many suppliers recommend that liquid fertilization begin as soon the first true leaves ...
 See also: Plant, Water, Seedling, Growing, Planting
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