Sowing and Raising Seedlings: Growing Houseplants from Seed
Growing houseplants from seed yourself sounds like a test of patience, but it’s incredibly satisfying! From the tiniest seed to a mature plant, you get to witness the entire life cycle. In this article, you’ll learn everything about sowing and raising houseplants from seed.
Which Houseplants Can Be Grown from Seed?
Almost any plant that flowers and produces seed can be propagated from that seed. Especially well suited for sowing indoors are:
- Cacti and succulents: Patience is required, but the sense of accomplishment is huge!
- Palms: From the pygmy date palm to the kentia palm, palms are classic seed-grown plants.
- Citrus plants: Lemons, oranges, and mandarins can easily be grown from their pips.
- Kitchen herbs: Basil, cilantro, parsley, and chives are beginner-friendly.
- Annual flowering plants: Nasturtium, marigold, sunflower.
- Avocado and mango: You can grow decorative houseplants from the pits.
What You Need for Sowing
- Seed-starting mix: A special, low-nutrient, sterile soil — regular potting soil is too rich in nutrients.
- Seed trays or pots: Small, with drainage holes. Empty yogurt cups with holes punched in the bottom also work.
- Mini greenhouse: A clear plastic dome or cling film retains moisture.
- Spray bottle: For gentle watering without washing the seeds away.
- Grow light (optional): Provides enough light in winter or in dark spots.
Step by Step: How to Sow Correctly
- Moisten the seed-starting mix: Dampen the soil evenly before sowing, but don’t soak it.
- Sow the seeds: Scatter small seeds on the surface and press down lightly. Push larger seeds 1–2 cm into the soil. Rule of thumb: sowing depth = 2× the seed’s diameter.
- Keep it moist: Mist gently with a spray bottle. A dome or plastic wrap helps retain moisture.
- Keep it warm: Most seeds germinate best at 20–25°C (68–77°F). A windowsill above a radiator is ideal.
- Don’t forget to ventilate: Lift the dome or plastic wrap for 15–30 minutes once a day, or mold can develop.
- Be patient: Depending on the species, germination can take anywhere from 3 days (cress) to several months (palms, some cacti).
Pricking Out: When Seedlings Are Too Crowded
Once the seedlings have formed their first true set of leaves (after the seed leaves), they’re pricked out — that is, moved into their own individual pots. Use a dibber (or a pencil) to carefully lift the delicate seedlings out of the soil. Only handle them by the seed leaves, never by the delicate stem!
Common Sowing Mistakes
- Sown too deep: Many seeds need light to germinate and shouldn’t be buried.
- Too wet: Waterlogging leads to rot and “damping off” in seedlings.
- Too cold: Without enough warmth, seeds won’t germinate, or only very slowly.
- Too little light: Seedlings that don’t get enough light become “leggy” — long, thin, and weak.
- Impatience: Some seeds need weeks or months — don’t give up too soon!
Growing from seed is a wonderful way to raise exotic and rare plants affordably. With a little patience, you’ll be rewarded — there’s hardly a better feeling than seeing your very first seedling emerge!
This article may contain affiliate links. If you purchase a product through one of these links, Plantgecko may earn a commission at no extra cost to you. This never influences our editorial independence or which products we recommend.
