You should water lavender seedlings when the top half inch of soil feels dry to your finger. This works out to about every 2-3 days for most indoor setups. Check the soil each morning and only add water when it needs it rather than on a strict timer.
I killed my first batch of seedlings by keeping the soil too wet. The tiny plants looked fine one day and then fell over dead the next morning. After that loss, I learned to let the soil dry out a bit between drinks. My next round of seedlings made it through just fine with less water.
Your lavender seedling watering schedule needs to stay flexible. Hot dry rooms need water more often than cool humid spaces do. Seedlings in small cells dry out faster than those in larger pots. Pay attention to what your plants tell you instead of following a fixed calendar.
Overwatering lavender seedlings leads to fungal disease in your plant roots. Pathogens like Fusarium thrive in wet soil and destroy roots fast. But your seedlings can't handle drought like mature plants can. You need to find the middle ground between too wet and too dry.
Seafoam Lavender farm suggests watering only in the morning hours each day. This gives your soil surface time to dry out before nightfall comes. Wet soil overnight invites fungal problems that spread through your seed trays. Morning watering helps your seedlings stay healthy through this risky stage.
Try bottom watering as your main method when you can. Set your seed trays in a low dish of water for 15-20 minutes so moisture wicks up from below. This keeps the surface drier while roots still get plenty to drink. Pour out any standing water after that time passes to prevent rot.
Watch your seedlings for signs of water trouble. Yellow droopy leaves often mean too much water in the soil. Crispy brown leaf edges suggest not enough. Stems that pinch at soil level point to fungal disease from wet conditions. Catch these signs early and adjust your watering habits fast.
Your watering needs will change as your seedlings grow bigger over time. Larger plants drink more water and dry out soil faster than young ones. Roots that fill their containers need checks more often than small new sprouts do. Keep testing your soil and let your plants guide how much and how often you give them water.
Read the full article: How to Grow Lavender From Seed Successfully
