Growing cucumbers from seed is fun and easy! You can start them indoors, or direct sow them right into your garden. In this post, I’ll show you exactly when and how to plant cucumber seeds, step-by-step.
In fact, cucumbers are one of the easiest vegetables to grow from seed. Once you learn how simple it is, you’ll wonder why you ever bought starts before.
Here’s what you’ll find in this step-by-step guide…
Growing Cucumbers From Seed
If you want to try growing cucumbers from seed, you’ll need to choose which type(s) you want to plant first. Then you can figure out what method to use for starting them, and how long it will take.
Types Of Cucumber Seeds To Plant
There are tons of different types, and the variety you choose depends on what you want to use them for, and your preferred flavor or texture.
Recommended Cucumber Seed Starting Methods
There are two methods you can use for planting cucumber seeds: direct sowing or starting them indoors.
Since they grow so fast, I prefer to plant them directly into my garden. But you can do it either way.
- Direct Sowing – Sowing cucumber seeds in your garden makes it super easy, since you don’t have to worry about caring for the seedlings indoors, or transplanting them later on.
- Starting Indoors – You could start them inside instead. Some people prefer this method if they have a very short summer, or their garden soil isn’t ideal for direct sowing.
How Long From Seed To Harvest?
In general, the number days from seed harvest is between 50-70. The exact days depends on the variety you have, as well as the growing conditions.
Planting Cucumber Seeds
Read through this section to make sure the conditions are right for planting, and that you follow the proper steps to be successful.
When To Plant Cucumber Seeds
Plant cucumbers seeds directly into your garden a week or two after your last frost, once the soil warms up in the spring.
If you want to start them indoors, then plan to do it 4-6 weeks before the average last frost date in your area.
How To Plant Cucumber Seeds Step-By-Step
Cucumber seedlings don’t like to be transplanted, and doing so can stunt their growth. The plantable pots will minimize the transplant shock.
- Plantable pots or large peat pellets (optional)
- Seed starting soil (optional)
- Seed trays (optional)
- Clear tray lid (optional)
- Heat mat (optional)
Step 1: Prepare the soil or pellets – If you want to direct sow them, then loosen up the top few inches of soil in your garden first.
Step 2: Decide how many seeds to plant – Indoors, plant one seed per pellet hole or pot. In the garden, space them about 1 inch apart.
Step 3: Plant the seeds – Since they are fairly large, they should be planted about a half to one inch deep.
You can either lay them on top of the soil, and gently push them down to the proper depth. Or make holes first, and then drop them in.
Step 4: Cover the seeds – When you’re done sowing your cucumber seeds, fill the hole back in with soil. Then gently press it down to ensure the soil comes in contact with them.
Step 5: Water – After you’re done planting, water them well. Make sure the soil is evenly moistened, but not to the point where it’s soggy or completely saturated.
Cucumber Germination Time
One of the reasons it’s so fun to grow cucumbers from seed is because they sprout very quickly. Their germination time can be anywhere from 3-10 days.
If you want to speed up germination, then keep the soil warm using a heat mat indoors, or plant them in a full sun location outside.
What Do Cucumber Seedlings Look Like?
The first two leaves that form right after germination are called the “seed leaves”. Those are oval and slightly pointy at the tips.
All of the others that grow after the seed leaves are called “true leaves”, and they look like tiny cucumber leaves.
How To Care For Cucumber Seedlings
If you planted cucumber seeds right in the garden, then you can skip this entire section. But, if you started them indoors, it’s important to properly care for the seedlings.
- Light – Cucumber seedlings grow very fast. So it’s important to use a grow light right away. Otherwise they will quickly get tall and leggy.
- Water – They also need consistent waterings. Never let the soil dry completely, it should always stay moist. Use a moisture gauge to ensure proper watering.
- Fertilizer – As soon as the seedlings get their true leaves, feed them with a 1/2 dose of organic liquid fertilizer. They love fish emulsion or compost tea as well.
- Potting up – It’s essential to repot them as soon as the seedlings are twice as tall as the original pot or seed tray. Use a plantable pot made out of peat moss, coco coir, or dried cow manure.
Related Post: How To Grow Cucumbers Vertically
Transplanting Cucumber Seedlings Into The Garden
If you started cucumber seeds indoors, it’s crucial that you take the proper steps to transplant them into the garden.
The first step is to harden them off to prepare them for the transition. Do not skip this step, or they may not survive.
They hate the cold, so wait until all chance of frost is gone, and the soil has warmed up before transplanting the seedlings into your garden.
Growing cucumbers from seed is simple and fast. No matter which variety you choose, you are sure to be successful if you follow these step by step instructions.
Do you want to learn all you need to know about how to start your own seeds? Then you need to take my online Seed Starting Course! It’s a fun, self-paced, and very detailed step-by-step course that will teach you how to easily and successfully grow any type of seed you want. Enroll and get started today!
Otherwise, if you just need a quick-start guide that will give you what you need to begin growing your own seeds inside, then my Starting Seeds Indoors eBook is for you.
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- How To Grow An Avocado Tree From Seed
- How To Grow Tomatillos From Seed When To Plant
Share you tips for how to plant cucumber seeds in the comments section below.