PLANTER BOX GARDENING 101:
SEEDLING SUCCESS!
HOW TO START SEEDS
6 secrets for how to grow plants from seed
This is the eight step in Planter Box Gardening 101 series: Grow Seedlings with Success!
Step-by-step – here’s how to grow plants from seed.
First, there are lots of great reasons to grow plants from seeds. The best reason is that, dollar for dollar, seeds are much less expensive than buying starts from a nursery or mail order catalog. You can get HUNDREDS of plants for around a dollar, vs. one plant for a few dollars. I love to collect seeds from my own plants each year to multiply your investment.
Growing plants from seed is also a joy-packed process. I love watching those little babies go from tightly packed seeds to big, beautiful blooms each year! It’s fun to give away your baby plants to friends in the Spring or sell them in a neighborhood yard sale. After all, who can pass up a 3-year old selling lavender plants?!
Do you have a TON of seeds that you need to organize? Be sure to check out how I organized ALL my seeds in a Seed Catalog! I share my step-by-step DIY guide.
"To plant a garden is to dream of tomorrow." — Audrey Hepburn
Why are seedlings SO hard to grow?
Like many of you, I’ve had my share of total failures with learning to grow plants from seed. I have failed to grow plants from seed for these primary reasons:
-
Starting them too early in the spring (if you’re anxious to plant, work in your Garden Journal instead!)
-
Letting them dry out
-
Overwatering
-
They get “leggy” from the wrong light and don’t survive outside
-
Taking a trip/leaving them alone too long
Thanks to all those failures, I’ve finally found the formula of “secrets” that ensure healthy plants when I grow plants from seed. Here are my secrets–I hope they help save you time, money, and heartbreak!
Secret #1: A Dedicated Home for Your Starts
I’ve tried everything – starting in the greenhouse, on a counter top, in the garage, in a spare bedroom. We all have our own parameters and constraints we need to navigate so here’s my secret: It’s important to have a dedicated place to grow plants from seed that won’t be problematic for the next few weeks. Dedicate ONE SPOT where you can create the perfect growing conditions without disturbing the seedlings.
If you are moving your trays around every few days, it’s hard to ensure your plants are getting what they need.
My seed-starting space is the counter top in an insulated workshop in the garage. I have a small space heater in there that keeps the room between 55F and 65F. This, along with my lights and heat mats, create the perfect growing temperature.
Secret #2: Lots of Light!
Sunlight in the early Spring is scarce, even in my brightest windows. I have killed SO many seedlings because they didn’t have enough sunlight!
Seedlings need 14-18 hours of mixed wavelength light to grow strong, healthy, and not “leggy” (thin and weak). They grow leggy when they are reaching for light; help them out by giving them plenty of light!
I mounted a 4 foot shop light that holds two fluorescent bulbs. I use one cool light and one warm light bulb, attempting to mimic the sun’s wide spectrum of light for the plants to access.
Notice that I use a timer on my lights. This ensures they get enough light during the day, and experience a period of darkness. You can use the same type of timer you use for holiday lights. These are very inexpensive - shop them here.
Secret #3: Seedling Heating Mats
These are my FAVORITE secret of all! Seedling Heating Mats. They have made ALL the difference between success and failure for me and seedlings. If you want to grow plants from seed, you MUST try these mats! They keep the soil around 70F, which is perfect for getting little seedlings started. Too many times I’ve killed seedlings by forgetting to turn on the heater, or neglecting them for a day.
These mats are inexpensive, water-resistant, and ensure that my seedlings have idea growing temperatures. I bought this two-pack (which fits PERFECTLY under the Jiffy Starter Greenhouse 72-pack). 10″ x 20″ is the perfect size for my needs.
I leave these mats on around the clock for about two weeks when I first grow my plants from seed. These are not on a timer. Others may say you don’t need to keep the soil warm past a few days, but I do and it works great. They are silent, low voltage, and worth EVERY penny.
Secret #4: Choosing the Right Growing Media
Which media you choose depends on where you live and what you’re growing. Because I live in an arid climate (and everything dries out quickly), I prefer to use a wet mini-greenhouse environment. I have a ton of success with the little Jiffy Starter Pods, and LOVE the Greenhouse Starter Kit with 72 cells. They are easy to water from the bottom (you don’t want to dump water over tender little babies), and tend to be more sterile than other brands I’ve purchased. Did I mention I LOVE the 72-cell Starter Greenhouses? These fit perfectly on my seedling heating mats AND perfectly beneath my grow lights. Everyone gets equal amounts of light and heat.
Be sure to download my FREE Seed Planner for this Jiffy Tray; it’s a free PDF that will come straight to your email! This helps take the guess work out of “What did I plant!?”
Before I started my seedlings in my Jiffy greenhouses, I soaked my trays in hot water with a tablespoon of bleach. Then I let them air-dry before adding the dry pods and soaking them in water. It’s important to ensure that all bacteria and disease is killed off before trying to start your seedlings. They have a hard enough time surviving; don’t make it harder by letting germs or garage dust get in their way, too!
Keep a close eye on your starter pods, though! I found this one right in the middle and pulled it out immediately. You can see a fuzzy something growing across the top. It will definitely impact the growing seedling, and I don’t want it to spread to my other healthy sprouts. Hey, 1 out of 144 is not bad!