Cryptocoryne Willisii

Cryptocoryne × willisii is a hybrid that arose naturally in Sri Lanka. It produces narrow, lance-shaped, medium green leaves and usually stays 5–10 cm tall in the aquarium. Among the crypts used in the foreground, it is an option that is slightly larger and spreads faster than C. parva. It is suitable for a low foreground that needs no trimming.

Divide the clump into small pieces and plant them 3–4 cm apart; the roots must be buried and the crown left exposed. Fine-grained sand or a nutrient-rich aquasoil is suitable. Choose a spot where it will not be shaded by tall plants.

• Light: Medium; in low light the leaves stretch and the clump thins out.
• CO₂: Not required, but it speeds up spreading.
• Fertilizer: A root tab every 2–3 months.
• It spreads through underground runners; leave the daughter plants in place for a carpet. Its slow-growing leaves can collect algae, so keep the photoperiod to no more than 8 hours a day.