The following information was taken from the official website of the National Gardening Association (NGA) which is a non-profit organization founded in 1908. The NGA is an association of gardeners and horticulturists whose goal it is to promote gardening and horticulture through education, research, public relations, promotion and support. They are currently headquartered at their headquarters located in Washington D.C.

Planting Snapdragons In The Garden: How To Grow Snapdragons

When to Plant Your Plants?

If you’re planning on planting your snapdragon indoors, then you’ll want to wait until they’ve had time to grow into full size before starting them out. You don’t want them too small or they won’t have enough room inside. If you plan on planting them outdoors, then they will need to reach maturity before being planted out.

What Size Should My Plants Be?

A good rule of thumb is to start with one plant per square foot of floor space. That means if your floor area is 4 feet wide by 8 feet long and 6 inches high, then you’d use four plants for each inch of width and height. If you start with smaller plants, be sure to put a few extra in so that you have enough to fill the space.

What Type Of Soil Should I Use?

Most gardeners use a mixture of one part peat moss, one part vermiculite and one part perlite. This mixture drains well but still retains enough moisture for the plant. If you have soil left over from an earlier garden, use that as most gardens have a fairly similar recipe.

How Should I Water?

Water your soil from the bottom. Place a drainage tray underneath the soil and keep it filled with water at all times. The tray must be large enough for the excess water to run off, but small enough so that it is under the potted soil. This will prevent over watering as well as under watering. Be careful when planting your snapdragons that you don’t cover them up too much or they won’t get enough sun.

How Do I Know When To Water?

When the topsoil feels dry about a 1/4 inch down, it’s time to water. You don’t want the soil to be soggy, just wet. Also, when you squeeze a clump of soil in your hand, no water should drip out. If it does, then there’s too much moisture and you need to let it dry out more before watering again.

What Do I Do If My Soil Is Still Too Wet?

If you’re having a problem with drying the soil out enough you can cut holes into a trash can lid and place it over your plants. This allows the moisture to slowly evaporate and helps your plants at the same time.

After it’s dried out enough, remove the lid. Do not sit the potted soil on top of the lid if it is wet, as this could cause the soil to get too damp again. Keep a close eye on it for a few days to make sure the soil doesn’t stay too wet.

How Should I Transplant?

When you finally go to transplant your plants, hold them by the base and gently lift them up.

Sources & references used in this article:

The genus Antirrhinum (snapdragon): a flowering plant model for evolution and development by A Hudson, J Critchley, Y Erasmus – CSH Protoc, 2008 – protocols.scienceexchange.com

Mineral nutrition, growth, and germination of Antirrhinum majus L.(snapdragon) when produced under increasingly saline conditions by CT Carter, CM Grieve – HortScience, 2008 – journals.ashs.org

Growth of salt sensitive bedding plants in media amended with composted urban waste by EM Smiley – Phytopathology, 1920 – American Phytopathological Society

Improving growth, flower yield, and water relations of snapdragon (Antirhinum majus L.) plants grown under well-watered and water-stress conditions using … by KA Klock – Compost Science & Utilization, 1997 – Taylor & Francis

Snapdragon rust by AA Asrar, GM Abdel-Fattah, KM Elhindi – Photosynthetica, 2012 – Springer

Bumblebee foraging responses to variation in floral scent and color in snapdragons (Antirrhinum: Scrophulariaceae) by GL Peltier – Bulletin (University of Illinois (Urbana-Champaign …, 1919 – ideals.illinois.edu

Effect of Gyttja and Nitrogen Applications on Growth and Flowering of Snapdragons (Antirrhinum majus L.) Plant in the Two Soils Depth by E Odell, RA Raguso, KN Jones – The American midland naturalist, 1999 – BioOne

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