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Strawberry planting substrates

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In my initial experience trying to plant strawberries, I had lots of issues which I put down to the substrate. But it's hard to be sure what exactly it is about one or other substrate, that makes it suitable or not. Added to the problem is that many substrates that you get locally do not label the nutrient and other characteristics of the substrate (eg coarseness, salinity, conductivity, besides the usual NPK content). So I looked up strawberry substrates on Google, and came across this one by Plantaflor. What's interesting are the stated properties, which I will use in future for reference. Coarse structure, with a relatively low salt concentration (KCL 0.7g/l), NPK 18-10-20. More recently, by chance I bought some Bioflora all purpose potting mix (with Sunflower on packet). This mix looks to be high quality with a uniform dark crumbly texture, and no random sticks or clay balls. On the other hand, the Bioflora potting mix on the right with random flowers seems to b
Strawberry planting In December 2019 we had a great holiday in South Korea. One of the day trips included a trip to a strawberry farm (I can't recall it's name or location now) but the strawberries were big, sweet and juicy. Nothing like what you get in supermarkets in Singapore. I was hooked. So, some strawberry seeds were saved. And we also had a few from a kit that LL bought in Singapore. These were Alpine strawberry seeds from Paris Garden, and I think it originated in HK. The first seeds were sown in the pink pot on 26 December 2019, straight after we got back from Langkawi. The Paris Garden kit came with a flat peat pellet that swelled with hydration and was placed in the pink pot. It only took a week before the Alpine strawberry seeds germinated. These gave rise to very small, fragile looking seedlings with the 2 cotyledons. The Korean strawberry plants germinated later, perhaps about 2-3 weeks later. They were stouter with thicker stems and leaves. As the se