When to Plant Melon Seeds?

Apr. 08, 2021

Many of us have tried growing tomatoes, peppers or herbs, so why not try growing something different this summer. Melons are a fruit salad staple and are perfect for growing in the greenhouse. They may require a little more effort than your standard tomatoes but are worth the investment. We've created a useful guide on how to grow melons in your greenhouse to get you started and excited about growing this beautiful fruit. Melon seeds manufacturer'll take you through sowing melons, growing your own fruit and when to harvest them so you can impress your friends with your gardening skills.


When to plant melon seeds

When growing any fruit or vegetable, the danger of frost can pose a serious threat to your produce. For this reason, growing melons in a greenhouse is much more forgiving than growing them outdoors. You can start sowing melons from mid-April until the end of May. First, soak the seeds in warm water for 24 hours to encourage germination and penetrate the Hami melon seeds. Then, like most fruits or vegetables, you will need to sow the seeds about 1 inch deep directly into a small pot about 3-4 inches in diameter. Water the seeds gently as soon as the soil looks dry, taking care not to over-water the sweet melon seeds so that they don't germinate.

How to grow melon seeds?

You’ll know it is time to move the seedlings from their smaller pots and into grow bags when they have two true leaves. Your seedling will grow best with a greenhouse temperature of 18°C (59°F) minimum and preferably no higher than 23°C (73°F). 

Transfer your seedlings from their pots into their grow bags being conscious of the soil you are bedding them. The most important factor in the yield when growing melons is the soil temperature. If the average soil temperature is 21°C or higher then melon yields can be expected to around 20% higher than a cooler temperature soil – put the grow bag inside the greenhouse into the greenhouse before planting up to allow the compost temperature to warm up. Ensure your soil has a pH of around 6.0-6.5 and is mixed with rich organic matter, compost or manure will work the best. Proper drainage is also essential as with the majority of fruit and vegetables.


In preparation for the melons to grow, create some support for them to grow around.

You can use a single line of string tied to the inside of your greenhouse or have wooden support sticking out of the ground next to the melon. As the melon begins to grow tie your strongest shoot to the support you have set up. Similar to growing tomatoes, pinch out the side shots which will be growing from the main stem. This will encourage the plant to grow upwards. Then when the stem has reached the top of your support, pinch out the plant’s leading shoot. By doing this you will be encouraging the plant to focus on the production of the melons themselves rather than to grow taller. Keep the number of melon buds per vine low so that the plant’s energy will be put into fewer melons. This means each melon that you grow will be larger, compared to if you let 2-3 melons grow per vine.

When to harvest melons?

Every melon has a different maturation time and will show it’s ready to be harvested differently. Each melon will ripen individually so keep a close eye on all of them. Knowing when a melon is ripe can be an art form, but you can pick up some general tips quite easily. Look for a ceasing in growth and tap the melon gently to see if you can hear a dull thud. If you are really unsure and have multiple melons you can test one by cutting it open. Separate the vine from the melon before it happens naturally as it will be rotten by the time it comes loose. One plant may produce multiple melons ripening over a period of 3 weeks. The beauty of growing your own melons is that you can harvest them later than commercial melons. This means that your melons will have longer to ripen, produce more natural sugar and therefore be sweeter than ones you buy from shops. Growing melons can be a challenge compared to other fruits but the rewards are worth the extra effort and very distinguishable from shop bought melons.

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