Herb seeds for indoor gardens come down to a choice between at least 10 species that genuinely thrive on a windowsill or kitchen counter all year — from basil and parsley, which typically germinate in 5 to 7 days, to rosemary and thyme, which grow slower but keep producing year after year.
Herb seeds for growing indoors vary widely in germination speed, light needs and how long a single sowing keeps producing, which makes picking at random a common way to end up disappointed. This guide sorts the ten most popular varieties in our catalogue by those three factors, both for a traditional pot on a windowsill and for a LetPot Mini smart garden, so you can pick the right seeds for your space instead of buying at random.
Products mentioned — in stock at IndoorGarden, shipped from Tallinn across the EU.
LetPot Mini 5-Pod Smart Indoor Hydroponic Garden – Grow Herbs, Greens & Veggies Year-Round
59,00 €Add to cart
Organic Parsley ‘Gigante d’Italia’ Seeds | Smooth-Leaf Parsley for Hydroponics & Smart Indoor Gardens
1,99 €Add to cart
Organic Sweet Basil Italiano Classico Seeds | Aromatic Culinary Basil for Hydroponics & Smart Indoor Gardens
1,99 €Add to cart
Why only some herb varieties suit indoor growing
Indoors, light is the main limit, not temperature. At Baltic latitudes, a winter windowsill delivers only a fraction of the light a herb would get outdoors in summer, so the variety you choose has to cope with fewer hours while staying compact enough not to stretch and topple. Iowa State University Extension notes that most herbs indoors need at least 6 hours of direct light a day, well-drained soil and containers with drainage holes — exactly what a standard outdoor variety on a windowsill usually lacks. The herb seeds in our catalogue are chosen for these three criteria first, not flavour alone.
Basil and parsley — the fast classics
Basil and parsley are two of the fastest herbs to grow from seed, and both give a cuttable harvest several times from a single sowing. Our Sweet Basil Italiano Classico seeds typically germinate in 5 to 7 days at 21 to 24 °C, with most growers taking a first cut after 3 to 4 weeks and continuing weekly cuts for around ten weeks. Our Parsley Gigante d’Italia seeds germinate more slowly, in 12 to 18 days, but once established keep giving leaves for more than 2 months. Both do well in a pot on a windowsill or in a LetPot Mini pod.
Coriander, dill, chives and cress — the fast-growing extras
This group suits beginners well, because it forgives even inconsistent watering. University of Vermont Extension lists chives, mint, parsley and thyme as the most forgiving indoor herbs, tolerating uneven watering and a range of light conditions better than most. Coriander typically germinates in 7 to 10 days, dill in 10 to 14 days, and chives are the slowest of the group at 14 to 21 days, but then grow back for years, giving a fresh cut every spring. Cress is the fastest of all — the first cut typically comes in just 6 to 8 days, so it suits anyone who wants a result within a week.
Rosemary, thyme, sage and lavender — the slow-growing perennials
This group needs patience, but pays off with years of harvest from one sowing. Rosemary and thyme seeds germinate unevenly and slowly, often 14 to 21 days, and a usable first harvest typically takes 3 to 4 months. Sage and lavender are just as slow, but once established can survive several years on the same windowsill with minimal upkeep. Growing these alongside the fast crops works well — while you wait for rosemary, basil and parsley already cover everyday cooking.
Pot or smart garden — how to choose
A pot on a windowsill works if you have steady, bright light for at least 6 hours a day and remember to water regularly. If light or time is limited, a mini smart garden such as the LetPot Mini solves both problems at once — the built-in LED runs on a timer, and the water tank keeps the root zone evenly moist between refills. This combination of fast-growing seeds plus a smart garden typically gives the quickest first harvest, in as little as 3 weeks from sowing.
Ten herbs compared
| Herb | Germination time | Light needed | Price |
|---|---|---|---|
| Basil (Italiano Classico) | 5–7 days | 12–14 h | €1.99 |
| Parsley (Gigante d’Italia) | 12–18 days | 8–10 h | €1.99 |
| Coriander | 7–10 days | 8–10 h | see category |
| Dill | 10–14 days | 8–10 h | see category |
| Chives | 14–21 days | 8–10 h | see category |
| Cress | 6–8 days | 6–8 h | see category |
| Rosemary | 14–21 days | 14–16 h | see category |
| Thyme | 14–21 days | 12–16 h | see category |
| Sage | 14–21 days | 12–14 h | see category |
| Lavender | 14–21 days | 12–14 h | see category |
Frequently asked questions
How long do herb seeds stay viable?
Most herb seeds stay viable for 2 to 4 years when stored cool and dry. The germination rate printed on the packet shows what share of seeds will actually sprout for that batch.
Do herb seeds for indoors need different treatment than seeds for the garden?
No. The same seed germinates in soil or in a hydroponic sponge — what changes is the growing environment and nutrient delivery, not the seed itself. Indoors, the main difference you need to make up for is the amount of light.
How much light do herbs on a windowsill need?
In natural light, that’s at least 6 to 8 hours of direct light a day. Under an LED grow light, that rises to 12 to 16 hours, since a lamp isn’t as intense as summer sun.
Which herbs can I grow in a LetPot Mini smart garden?
All ten covered in this article. Basil, parsley, coriander, dill, chives and cress do best because they’re compact and fast-growing, while rosemary, thyme, sage and lavender need more time but will still do well in the same pod.
Why isn’t my basil or parsley growing fast enough?
The most common reason is not enough light — a windowsill in winter supplies only a fraction of what’s needed. Check whether the plant gets at least 6 hours of direct light, and if not, an LED grow light or a smart garden solves the problem without moving the plant to another room.
If you want to start today
The easiest place to start is with basil and parsley seeds in a pot on a bright windowsill, or in a mini smart garden — both varieties give a first harvest faster than anything else on this list. Once those are sown, add the slower-growing perennials alongside them, and within a few months you’ll have a full range of herbs on one windowsill, all year round.
